Therefore, the boss will have to be nice to them. Therefore, the boss can't be a horrible person.
You should study up on logic. You are saying that since person A has to be nice to people who work for startups they can’t be a horrible person. This means that if a person is horrible they can’t be nice to people who work for startups. This is egregiously wrong.
I think what PG is saying in this situation is, he's using "evil" as shorthand for "is not nice to their employees", whereas you're reading it as "is fundamentally bad in every way".