Maybe they consider strength as a side effect of getting muscular? On the flip side, why do most of us need to get that strong? It's not like we're going to need to lift a car off an old lady/young kid on a daily basis.

On my end, i train to be able to do new things with my body. Be it a new gymnastics flip or a new bboy move or a martial arts/capoeira trick, or just to outlast the other guy in a capo game. I do like the side candy i get in the form of strength and aesthetic gains.