thats one way to look at it. Another way is to say “is ANYONE (with similar hand size to me) showing great skill on 3-4 stuff. if they can do it, I can do it”
of the two alternatives, id say shifting over to 1-2-3 fingering is WAY more radical than just slightly and gradually increasing the workload and intensity of the 3-4 stuff
and did someone mention tone? obviously tone/distortion etc matters a huge amount. I mean with a modern high gain setup its not like u have to slam down on the note.
also, what about the guys who do the legato thing where they dont pick ANYTHING. Surely they do some pretty strong 3-4 stuff and also of course getting plenty good tone from the pinky