Still, I eat with proper European table manners, because it's all we have left. Without that, it would be total anarchy! We might as well wear trousers on our heads and wear baguettes for shoes!
What's next? Wearing a neck tie on a shirt with buttons in the collar or - God forbid! - with short sleeves?! gags at the idea
In much of Asia, knifes are reserved for the kitchen, where it's the cook's job to chop everything up into bite-size pieces before being served.
I used to live with a British flatmate who was otherwise a nice person, but would constantly harp on me when I was eating "You're using your knife and fork incorrectly."
So for a while, I tried it her way, just to see if I could get used to it, and if it was actually better. After a while, I could kinda do it, but frankly, it always felt awkward and clumsy, and there was no obvious advantage.
Both techniques have their merits—lack of switching -versus- use of primary hand for extra knife power/control—but frankly, both work just fine, neither is obviously superior, and the main difference is what you're used to (in most cases, over decades).
If you're eating dinner the the Queen, then yeah, take a cutlery course first, learn how she does it, and try to do that. She probably doesn't care, but hey, you're eating with the Queen, so a little deference to tradition and pomp seems the way to go.
Otherwise, just do what feels natural to you. If someone whines at you, ask them which hand they'd prefer to be stabbed by, and if you're doing it wrong...
As a kid, I was a cut-and-switcher, so maybe cutting with the right was more natural, but it definitely didn't seem hard to make the switch.
Upon being informed that was a faux pas, I cut with the fork in my left, knife in right.
Finding it difficult to lift the food with my left hand, I intuitively adopted cut and switch and would eat with my right.
Noticing that no one around me (in Quebec) seemed to do this, I eventually adopted the European manner.
Now, following the Paleo diet, I frequently end up simply eating with my hands when at home. Feels great.
I'm now either incredibly avant garde or a brute.
That said, my wife and I are eating out French tonight, so I'll try to put down my guilt and manners and not switch hands!
At the same time these rules were invented, you would have been hanged or worse for a good word, because of your left-handedness. Weirdo.
I'm right-handed, yet hold the fork in my right hand and often get comments about being 'cack-handed'.