So you have one bad example and you ll sell no to everyone forever from now on because of that?

(I understand you'r still learning, but at any and all lvls of the game the tank outputs more aggro generation no matter who the dps is, if played right)
If someone asks me to rush when I'm tanking and the rest of the party doesn't mind and I don't mind it, then I'd say okay and lead the way.

Even in your example you could of just told them: "Sure, but let me do the pulls from now on" or something like that.