Some people have really disgusting eating habits, but that has usually nothing to do with which hand holds the fork or knife - they are just disgusting.
It never put me of my food, because someone does the cut’n’switch - it just looks different to me - no judgment.
Yeah, I don’t actually care what anyone else does, as long as they can do it without spilling food, dropping utensils, making noise, bumping into others, or otherwise making the mechanics of their eating obtrusive.
That is the thing with manners… it is just what we were taught.
I could be at the nicest steak house and pick up a piece of asparagus gently with two fingers and bite the end off and place it back nicely on the plate and wipe my fingers on the napkin folded neatly in my lap.
This would be a horrible faux pas in most circles, but was anything really “wrong?” It has just been trained into us that this isn’t done, so we don’t do it and we look poorly at those who do.
Same as any other manners… does the napkin really have to be in the lap? Does the glass really need to be on the right? Does it really matter if we use the salad fork or the regular one? The only reason it matters is that it is what we were taught to do and to be part of polite society we do our best to follow these rules. Like it or not though, I see someone breaking one of the “rules” and I think they aren’t trying to be polite.
The problem is that not everyone was taught the same set of rules. From what I was raised with, if I don’t switch I’m being rude.