Let's be real for a minute here. A lot of people seem to have forgotten how terrible Baldesion was at release and suffered from almost the exact same problems than Forked Tower does today, precisely because the latter has been a gigantic copy paste of the former in terms of entry restrictions. The main differences mostly lie into the instance duty cap (144 vs 72) making it a lot harder to get any group going at all inside Tower, so BA had more groups going in back then, and the initial absence of ticket system in Hydatos until the next patch so in comparison there was also a LOT more griefing and toxicity inside BA.
Ultimately it's been two duties that were originally designed to be cleared only by a handful, where most of the wall preventing a wider clearance was mostly the entry that artificially barred people from attempting 1) multiple times since groups needed the proper weather type and the Ovni / group preparation as well as releveling after a wipe and 2) the limited amount of slots and having to deal with randoms inside.
Forked Tower so far may be panned by critics, but so was BA, perhaps less so, I don't know, but it was full of problems as well. Then what happened? Hydatos turned obsolete/old, instances petered out, and since there is now not more than a single instance running, it's quite easy to get a full group in (56 people). More, the content has been solved since forever as well, but the fact remains that the entry requirements aren't a problem anymore. So people logically find it suddenly "good content". After Stormblood ended, there has been this slow but radical shift in perspective precisely because the experience of the content suddenly got a lot smoother as a result.
And I do believe Forked is going to be the exact same thing once South Horn gets obsoleted and people stop playing it. Instances are going to go down by a notch, perhaps one or two active at the same time at best. Randoms won't try to get in, and organized groups will have a super easy time all meeting up in the same instance, get in, and attempt their clears. There will still be like for BA all the constraints of the time it takes between two actual attempts if you fail, of course, so what's left to compare is how much of a no brainer the content is once solved, because for BA, it's a no brainer, just follow some instructions and you're gucci. If Forked is savage levels of difficulty however, requirement practice to get through party wiping mechanics or body checks, then it's gonna be a different story for sure.
All of this makes me think that this type of content is only aimed at hardcore groups, world first or streamers at release, and becomes actually manageable for everybody else once the content gets obsolete. I'm personally not sure this is a good model at all, but mark my words, everybody is gonna praise Forked or remember it "fondly" once DT is history.