Example listed in the post you only quoted the last line.
" The question is if people are willing to give up the freedom of gear alt classes without actually setting a foot in any content with them (and with a terrible 450 lockout that means you will only gear 2-3 classes max) or people having to earn their gear on different jobs by actually playing them, speeding up the queues AND gear time of different roles."
You are assuming people who play DPS don't play tanks or healers, with the current system you are extremely limited on how many classes you can play/gear up, which is ironic when the armory system is one of the main attractions of this game.
The topic is poetic gear, not ST gear.