Because the other MMO's I'm interested in are actively sabotaged or have been in the past by their creators.

The damage Ben Irving did to SWTOR is something the game is still grappling with even years later - and hilariously he's part of why Anthem was so bad imagine that - and while he's long since left the project and Bioware I can't bring myself to fully enjoy that game due to the design decisions he forced upon it. It also isn't helped by the fact that SWTOR at it's core still deals with EA's full on temper tantrum over being forced to go free to play barely a year into it's life cycle and while I don't mind paying a sub for a game, the sheer mount of stuff withheld from you if you don't sub always left a bad taste in my mouth. The game did have a new expansion drop recently however so I'll eventually look back into it once the patch lulls for FF settle in.

On the other hand LoTRO has one of the best stories in any MMO I've played and I loved how they integrated the world of Tolkien into their own personal writings on the characters and the supporting cast you never get to see in the original novels. Yet WB killed that game before selling it off and when I went back recently, happy to try it after the new developer had settled in, what I found was a grind that just completely turned me off from the story. The once non-intrusive cash shop felt way more pushed than before and even though my character was at the climax of the story from when I last left off I just couldn't bring myself to continue. Mind I fully acknowledge a lot of this is likely due to changing tastes - as WB's slow death of the game via the immensely long content droughts pushed me to other games. But it just isn't enjoyable for me anymore.

Of the two I likely will go back to SWTOR at some point but I'd likely drop my sub the second I finished the expansion. Nothing has really hooked me for as long as FF14 did, or inspired me to stick around when RP wasn't of interest. I've tried a lot of other games, WoW included, and I'm just not a fan either.