Are we really supposed to grind fates to 50 on sub-classes? No more quests? Alts?

[Princey]

I made the mistake of doing all the quests below level 30 on my main, my Arcanist. I don't even remember doing them all but I apparently did, all the main city area quests, Uldah, Limsa, Gridania, etc. Upon getting 31 summoner I felt like making a bard so I did, had Gridania quests till 20, but after that I realized I would have to grind my entire way without quests after, running around across the map on my mount doing boring fates.

Why does the game have such few quests? Are we expected to mindlessly grind on fates on every sub-class we want to play to get to 50? Is this how the game is gonna be? Because it's really gonna bore me.

I just legit want to know. Should I make a new character? Not abandon my current character, but like, have certain classes/jobs on 1 char, and certain classes/jobs on the other, just to not keep the game so grindy. I know you can have everything on 1 char and there isn't very much reason to make an alternate but other than that I don't really see another reason why people look down on making more than 1 character.

Bit of a whiny thread but I'd like some positive insight here. I am enjoying the game so far, but this is the only part of the game that I'm going to complain about honestly. Discuss?

tldr Add repeatable quests for sub-classes.
Make guildhests worth doing more than once.
Add more quest storylines in general |: