There ars a lot of things in life that are like this, IME. There's a cynical or pessimistic way to look at something (often an interpersonal thing), and if you assume that it's true, then whether or not it was true, it becomes true for you. In those cases, the only rational thing to do is act as if it weren't true.
Example: incels. Lots of people have rough lives and have a hard time developing socially in all kinds of different ways. It sucks. Sometimes that leads to guys who have a fundamentally hard time interacting with women they are attracted to, which can lead to downward spirals of rejection and misery. Some guys cope with this by becoming incels or redpillers or whatever. "Girls don't like me, I'm so sad" is transformed into "Girls don't like me because girls suck and society sucks and it makes me awesome". It's really depressing, but there's a rationality to it in that it trades pain for anger without changing the situation. But even if someone isn't an actual incel type, once they assume that identity and start to believe it, they'll become one, which is why it never does anyone any good to start thinking of themselves as incels or redpillers. But this isn't just about incels. There are innumerable self-fulfilling, self-destructive viewpoints out there, in which even if they're rooted in elements of truth, it doesn't do anyone any good to accept the viewpoint.
Other examples include the Golden Rule, taking the high road, etc. EDIT: meaning, the notion that the Golden Rule or taking the high road all the time is for suckers, therefore you shouldn't do it. It assumes the worst in people, and if you live your life that way it ensures that you have bad interactions with people that reaffirm your already-cynical viewpoint.
But, uh, I may have gone off on some tangents there. Sorry HN. TL;DR even if your 1:1's with your boss suck, don't give up on trying to make them more constructive.