I'm in Europe and I did the same as a child because it just felt the most natural. But you better believe our teachers in school would try to force the opposite. The argument was that imagine if everyone cuts with their right hand, but then you cut with your left and cause a lot of annoyance by bumping your elbow info your table neighbor's elbow.

Absolutely a non-issue in reality obviously. But nowadays I do hold my cutlery "properly" as a result. To me it now feels natural to bring the fork to my mouth with the left hand. Or the right one, really, but I default to holding it in the left.

Ahh! Yeah, my teachers were equally unimpressed - but none of them gave the argument you mentioned, which could at least be understood (like elbows on tables).