I have met few famous devs and eventually it seems most turn like that.

One explained me that they are bombarded non-stop by people for years and years and at the end they'd rather be mean than "waste" their time on the rare chance of having a meaningful interaction.

The overwhelming majority of their interaction ends up with people asking them for opinions about their projects, collaborations, etc, and it gets so tiring that they statistically prefer to lose the chance of having a nice meaningful interaction rather than take the chance of yet another waste of time.

I know it's mean, but I get it.

Not saying they are all like that, just saying it's quite common among famous developers, they are bombarded non stop by people wanting to chat.