I completely agree with the gist of your argument. But this minority is big enough for some devs to consider.
Not if the big enough part is just the minority. It has to be the vast majority which it simply isn't. Personally for me, it all depends on the game itself. If it's for example the upcoming Rage 2 than it should be a locked 60FPS because the shooting is fast paced and the frame rate needs to be there to keep up with the fast paced movement and shooting. For a game like Metro Exodus, a locked 30FPS would be perfectly fine because it's a slow methodical stealth based exploration game. You're not going to be moving even half as fast as you would in Rage 2 or say Doom from 2016.
For third person games, im perfectly fine with a locked 30FPS and prefer it over an unlocked 60FPS because then, the frame rate is going to vary throughout your play-through and I would rather have the stable locked 30FPS. For a game like DMC 5 which is fast paced but it's in third person, not first which when playing, you can feel the difference and why 60FPS is needed for first person but not necessary for third person. And again, I would rather have a locked 30FPS for DMC 5 as opposed to one minute, it's 60FPS, the next 45FPS, the next low 30's, etc. I prefer it to be stable and simply "set" throughout.
All depends on the game, genre and perspective. I play only on consoles and for example, I know Far Cry always runs at 30FPS and honestly, I have never had any issues whatsoever. If anything, it's more about the optimization and the development team taking their time to correctly optimize the frame rate. Kind of like they have to do with HDR but usually don't.
I downloaded the demo but haven't played it yet but im not anticipating or expecting any issues whatsoever on PS4 Pro. Simply, I care about the stability and the consistency more than I do a higher frame rate that's not stable, not consistent and jumping all over the damn place.
