It's the case since unsync is possible for all pre 3.0 content.
Why do you complain now?
btw I don't care much about how other people do their dungeons/primal/whatever, if people with the same mind want to do it sync it's always possible.
I do it myself (often with my group) just for fun.
But don't expect everyone doing old content sync for no reason when they have to do the recent content too.
Don't forget we are in a MMO. We have LS, FC to do stuff with same minded people (yet most of the time people just wildly invite in fc but heh ... not my problem if they just want people to have people)