I think people are all involved at different levels and folk always stand behind what will get them or their preferred choices up the ladder some - a lot of banter re what you should and shouldn't like is all geared to making sure the person giving it moves up a level somewhere down the line, or, their particular nemesis is seen to, or eventually does, move down the ladder.
Very few musically mature people would in reality call any related music or micro-scene irrelevant or 'shit'.