Usually I actually share your opinion. But last year I was in a situation where I spent a lot of my work time, spare time, and private ressources (e.g. invites to lunch or cinema, even letting a new coworker use my apartment for free while looking for an apartment of his own).

My goal was to build a real team out of the random bunch of coworks and actually succeeded. In the end we were a competitive, cooperating, efficient machine putting out about 10 mandays of customer value in 2-3 real time days if necessary.

In that example I really felt compelled to leave WITH the coworkers. True they were hired by my employee, but the team was built by my coworkers and me.

PS: So, considering examples like that, maybe next time you could try to formulate yours a little more open for alternatives. E.g. "Interesting point of view. Let me add another one: [...]" What do you think?