How does PL'ing affect you?

[Vahzl]

the character development. the learning to play your player, maybe your happy with just spamming cure? there is the quests the story of the world and the lore. new patches are being released all the time with new content, not just endgame content but stuff inbetween stuff that you want see coz you got your gaze set on the horizon waiting for endgame. but as i say play how you like it really don't affect me. in answer to OP's question PL don't affect me

So in all of the above, where does the need to grind over being power levelled come in?