I thought this would simply be about the knife and the fork switching hands, but holding the fork tines up or down (spearing vs scooping) is new to me.
On the other hand, I don't think Americans ever pick up food with their fork and switch the loaded fork to the other hand, especially if the food is scooped, not speared. A lot of food would be dropped in the process.
As a non-conformist, I taught myself to use my knife in the non-dominant hand so that the fork is used in the same hand regardless of knife usage.
This is bonkers. Just cut the food with your non-dominant hand. If you're so weak that you cannot cut the food with your non-dominant hand then you're either a small child, elderly, or you have a medical condition.
You obviously haven’t done it both ways and are assuming that spearing requires more dexterity than cutting. Hilarious that you could just try it for yourself and figure out that knife in the dominant hand works well but choose instead to bore everyone with your ignorance and stunning closemindedness
Do you always get fish served deboned? Cutting it with non-dominant hand sucks, especially more bony ones like trout. For me doing almost anything with my non dominant part sucks, my left hand is 20x less useful.
Just guessing here, I'm left handed also. I don't trust myself to cut a piece of steak using the knife in my right hand. So, after cutting with my left hand, I put the knife down and use my left for forking.
Or, it could be what my English son-in-law does, he uses his fork and knife, in different hands to aid in pushing food onto his fork. (He's right handed, not that it matters in this case.)