Presumably he is US-based, in which case you can. I did find the verbiage of "discontinuing" people rather unsettling, but otherwise it's a thoughtful piece that resonated with my experience.
I see he is based in Berlin, Germany (according to his LinkedIn) where it's extremely hard to fire people (especially for reasons he mentioned in the post) once they are past the 6 months probation period. This smells like he is giving advice that he didn't do himself. Firing people is a pain for all parties involved.
You'd be surprised how many folks (many people on bluecard visas) take such severance "offer" without any legal consultation. Many tech immigrants in Germany do not know of their worker rights.
Yes! The difference between how German employees who got laid off deal with the situation compared to bluecard visa holders, is stark, but not surprising.
I also noticed the language. I have been thoroughly downvoted as a consequence. I am however glad to see that there are multiple other in this thread also commenting on the same.