If Sowell is responding to specific claims made by researchers of systemic racism, then it can't possibly be merely empty rhetoric, it's a subject of active academic inquiry.
He never claimed that systemic racism could not exist. In fact, in his books, he openly admits that he believes that it did indeed once exist. He just questions whether the studies being produced today are done so without pre-existing bias (are they looking for data to back up their belief, or vice versa) and whether the data produced evidentiates the conclusion. If indeed the studies you cite and that he refutes are looking for data to back up their pre-existing conclusion, then propaganda is the correct description.
No one has put forth the argument that Sowell believes systematic racism cannot ever exist. All that has been said is that he questions whether it currently exists today and the conclusions of the studies you cite.
The comment I was responding to literally said "It is immeasurable, undefinable, unchangeable. As a propagandist you must take care to use things that can not be countered. Systemic racism is one of those." A very clear implication that systemic racism doesn't exist.
Now, this may not be Sowell's views, but fortunately for Sowell, I never mentioned him in my initial reply.
> He just questions whether the studies being produced today are done so without pre-existing bias (are they looking for data to back up their belief, or vice versa) and whether the data produced evidentiates the conclusion.
All science is performed with biases. We couldn't possibly form a hypothesis without following our intuitions first. The question is whether our biases conform to the data. Of course, biases may also shape how we interpret data, but this is true for everyone. Sowell may be right, but let's not pretend that he, or anyone for that matter, is the only one approaching this research with a truly neutral, unbiased approach.
I think it's fair to subject research into systemic racism to scrutiny, but that's merely the process of academic review. It should never be touted as cutting through the propaganda, as if Sowell is some kind of crusader against the dogmatic PC police left.
> In fact, in his books, he openly admits that he believes that it did indeed once exist.
Now, call me crazy, but given that he believes it once existed, I find it hard to believe that he also believes that it's just over and done with now. John Lewis just died recently, and I consider it unlikely that we'd ferret out racism from our systems in just that span of time, especially when I hear stories of, for instance, a North Carolina legislature disenfranchising Black people with surgical precision as recent as 2014. If we still have that kind of explicit racism in our public institutions, it's unreasonable to think more subtle forms aren't also causing unequal outcomes.
Yes, he does believe racism exists within systems. But this is not what is meant by 'systemic racism'. Today, systemic racism is both a description of a problem, as well as an insinuation of its cause -- namely 'white privilege' and white hegemony -- and an insinuation of solutions -- namely progressive legislation. Sowell rejects these insinuated causes and insinuated solutions and instead believes discrimination and poor outcomes for blacks today is driven by progressive policies such as a lack of school choice, laws encouraging loans be made to blacks who cannot afford it, etc. He believes that blacks will be helped by a return to a less regulated market. While this viewpoint could be named under the umbrella of 'systemic racism', let's be honest with ourselves that that's not what the term has come to mean
Also, if you believe that institutions discriminate against Black people, is the direct implication not that Whites are privileged over them in these spaces?
And as for school choice, my understanding was that the research showed that school choice worsened racial education outcomes, like this paper claims [1]. I know I've seen other research to this effect, but this is just one of the first results of google scholar. If nothing else, I would assume that any school choice policy must be coupled with a progressive transportation program, lest that choice become determined by geographic disparities, which because of segregation policies both on the books and within people's historical preferences, just bakes in racial disparities.
Regardless, to act like school choice is some kind of underground counter-culture movement to a progressive-dominated education system, when Betsy DeVoss is Secretary of Education, seems misguided at best. I don't know why you feel the need to dance around terms like "systemic racism" as if it will inadvertently empower a progressive movement when that progressive movement isn't even in power.
[1] https://onlinelibrary.wiley.com/doi/abs/10.1002/pam.20226?ca...