no grinds in mmo's = shorter life span per player in game?

players only lasting a year or 2 in mmo's = game companies going lets just make them to last that long?

then we got tons of crappy mmo's like we do now that are all copy and paste or mmo's that feed u the same stuff over and over in them ...with a twist lol. right?

how many more failed mmo's will it take b4 they seriously go planned obsolescence on a mofo video game lol. might be way off or jumping the gun but ...ehhh i not play a mmo since ffxi for more then a year.