They are different things. I help people who need help, comment on design docs, and wish people happy birthday, have a good vacation and whatnot.
Required strolling with random people or going to lunch is not the same thing.
You do you too. If you love those things, great! Not everyone does.
You should consider how assuming, "Everyone works like I do, and can benefit from the same things I like" may be biasing you against people who don't think or act like you, or are not emotionally rewarded by the same things you are.
Don't know how many different firms you have worked for, or how many different groups you are in, but I have worked in enough different positions with enough different teams in enough different roles to know that this style works awfully well for me. And given the various successful projects I've been a part of (not all, of course), I'm reasonably sure that this style hasn't held me or the teams back.