I read it as the exact opposite: the reason Twitter is still ok* is not because all these people were just browsing reddit at work. You can't just gut Twitter to run on only a couple of hundred people and still expect the same results in the longterm.

Twitter was not a leftist commie welfare company as Musk and its fans want it to be. It was actually the fine work SRE (amongst others) put into it that makes it still tick along as it does...for now.

* actually some things are already breaking, but it will take some time for the real damage to surface on a technical level