They can tell us about their fruit baskets and flat hierarchies.

HR is often a great example of how fucked it all is. (Good humane HR is rare)

HR is the conservative arm of execs. They're responsible for setting company policies that reduce the risk of employee disputes and increase the chance of employees staying productive. That's why they say "HR isn't your friend". They have an outsized impact in large, chaotic companies and as a result they end up shaping the culture. HR is the lackey serving the demands of the capitalist machine.

If you admit you are chronically ill in the workplace you admit you won't ever be as productive as other "healthy" (aka those who didn't admit they are ill) employees. During layoffs you'll be the first to go.