For keeping the alt from being ridiculously overpowered while playing through everything for the first time, I agree. The problem is that once you get through all of the content, starring up those astels turns into a ton of highly repetitive grinding. Having to repeat that on each alt is no one's idea of a fun game.Don´t get me wrong i can understand your and OP´s wishes.
But i think it´s good that not everything is available on the main or accountwide. It´s good that alts make some sense next to playing just another class and that you won´t have everything day one. Even "gathering only" alts make sense when the players wants that and you get a free vault slot.
I saw a lot of players with an alt in other MMORPG´s and they gave this alt top gear through the main and rushed the whole campaign, just to play the endgame. In the end... they sucked at this class, because they didn´t put any efford in it and they played them maybe 2 weeks in the endgame and went back on the main or left the game etc.
Alts are part of the endgame for me and the moment will come, when the main is full-build or doesn´t have stuff to do left. No matter if it is this week or in a year.
I would like to see the crafting skill limited too in this way. But anyway.
I think it´s fine like it is and as i said... for such "i don´t like my class, but have problems to progress an alt again.", the devs could implement class-change-tickets.
But i´m pretty sure that something will be done about some RNG and the tickets and other stuff, so even this here won´t be a real issue in the future.