A melee job without positionals would be fine if those players are also happy being MCH-tier dps, sure, because that is where such a job would deserve to be.
Jobs that demand less from an individual player should be less personally rewarding (in terms of Big DPS numbers) and instead be more about enhancing other players in the group. Were I a nin-main instead of being trash at that job, I'd be pretty peeved that SE made a melee job that was both less mechanically demanding yet somehow more powerful than mine, because a good nin has to put in more effort than players who want positionals out of the game are often willing to put into the jobs they want positionals removed from. You yourself just said that jobs with any positionals are things you barely play. Why should their design cater to you in the least? There are other jobs whose gameplay hew closer to what you want mechanically.
But those players would (rightfully) complain that their job is too streamlined AND too weak (a problem that MCH is currently going through). To maintain a job that has zero positionals means that it needs other trade-offs, so what are SE's options? Add more mechanical complexity to job? Add cast timers? I guarantee that melee players who are complaining about positionals would also be upset if the job added either one of those things, too.
If you want a melee that doesn't worry about positionals for themselves whatsoever, play a tank. But in all honesty, and I mean this without any malice, it doesn't sound like melee dps in FFXIV is for you. And until SE does make such a job, or finally caves, they probably won't be.
The problem is that they have been de-emphasized for every melee job as of Endwalker. They are removing some from Monk, and for every other melee DPS that has them, SE has regularly reduced their value over the course of THREE expansions now to cater to people who aren't even regularly playing those jobs, who don't take them into content that is actually demanding in any way. They have been de-emphasized to the point where they can be pretty much ignored on every other melee except Monk and Dragoon, and their output is barely affected.
There's really very few ways for SE to fix that particular problem. One would be to make positionals hit considerably harder... but players who hate positionals would complain they are being "punished" for missing them. They could make it so that positionals are required to continue combos/get big pay off attacks... but those players would complain about that as well. Positionals upset them, complexity upsets them, and consequences for failing to keep up with their job's own mechanics upsets them, and one or all three of those things drives them off to play something else.
I don't think SE should be trying to design one or any job specifically to keep those kinds of players happy, and we've already seen what happens to jobs where they have tried to make everyone in the argument happy. It's called Monk (and also all the healers and tanks).