Is defense really that frowned upon?

Look. I've never had a bad experience (yet) with MH community and I try to keep it that way but I've heard through the vine that having defensive build are really a source of rage for some player? Is it true?

For context I've been playing MH games since generation , so since 2015. (Wow already?!)

And it's only been recently I've heard of that rumor so I need enlightenment if possible.