I mean the reason you have to ask is kind of… why

We’re in mostly a capitalistic world. Capitalism makes utilitarianism seem easy since it becomes easy to assign a “value” to everything. That kind of thinking easily gets you to naive cynicism. We’re conditioned to think certain things are more valuable than others - mental wellbeing and community have been steadily devalued.

There’s a saying “behind every cynic there’s a disappointed idealist”. We’re in a world where a lot of people grew up in a time of amazing technological advancement, but have been bitterly disappointed by how the world is today. These people are now getting to that age where they may have been working the same job for a while (if they got lucky with job security) and they just want to get the job done and not exert any more effort than necessary (since by their experience, it doesn’t “pay off”).

Let them be them, you do your thing. They don’t owe you any kind of behavior really, though it would be expected and polite of them to keep things at professional level of course. You don’t owe them either so you don’t have to let them bring you down. Don’t take it personally though because it really, really isn’t.