If I say something like "our interview process has put too much weight on brainteaser-type problems and I think we should scale that back".

The implication is that people who have been hired because they scored high on brainteaser problems are not, on average, going to be as qualified to do the actual job because the metric that we used to measure them (brainteaser problems) is not relevant to the job.

I'm inherently saying some of my teammates shouldn't have been hired.

Edit: just to be clear, my point is that Google has, to my knowledge, expressed this sentiment and made changes to their interview process to rely less on brainteasers. They did so without controversy. No one said "hey Google is saying some of its employees shouldn't have been hired by changing their hiring process".