if you play for the gear, you are not playing to have fun.
every patch brings new contents, that you can do if you have the "previous" endgame gear.
and if you are too lazy to grind endgame contents, they always throw in other alternative to obtain endgame gear.
also, Glamour exist. people farms everytime, just to look pretty.
you want a game that has only one endgame gear, like forever?
you can play Lightning Returns xD