Well they should not feel guilty that they are getting liquidity, but I think they should feel guilty that their employees get pretty much nothing in comparison.
> Investors, founders, and employees all believe that founders are taking more risk than early employees (this isn’t true once founders have exclusive access to liquidity)
As an employee in multiple startups, I can tell you that I never thought that. One startup went well, the founders got rich and I did not even compensate the salary compared to being in an established company (and I'm not even talking FAANG). When the startup goes bad, then the employees are screwed as well.
Employees actually have the risk of getting fired, of being lied about the finances of the company, etc.