Avoidance can be self preservation. My friends are fine with me not attending, why aren't you? Because I dont wanna join some human made sadness gatherings with some religious idiot talking about how my atheist friend is with God now?
Or, why would I put food on the table for the slowest gazelle?
I'd disagree with this - capitalism tends to reward defection from this norm, and it's been a stable equilibrium for centuries at this point. You have more of a point when it comes to community, but even many intentional communities are massively hypocritical when it comes to this, with higher-status people having the ability to deviate from norms at will.
helpful reading: https://en.wikipedia.org/wiki/Gemeinschaft_and_Gesellschaft