A quick search shows there are

Main Scenario Quest‎ (341 P)
Role Quests‎ (25 P)
Side Story Quest‎ (142 P)
Sidequest‎ (1,040 P)

To expect someone to do over 1k side quests just so their map does not clutter is mental gymnastics, if you dont want a way to remove them how about SE makes them mean something ... noone can tell me over 1000 Quests are needed AND that each and everyone of them is worthwhile.

And reasons like "I don't want FFXIV to attract that kind of players. Doing so is a sure way of ruining the good parts of the game in the long view." are personal reasons, this is about a game aspect and even if you take into account personal feelings, im sure SE cares greatly.

SE is already on a path of streamlineing content, i dont think the 2.X overhaul will be the last bit that gets adjusted.