It really is pointless asking for advice/opinion on this subject because it’s all entirely subjective.
Sure, there are sound arguments around body position, weight distribution, leverage, steering effect etc all of which will be altered by the width of your bar and may well contribute to better control when you take a purely ‘physics’ approach to the argument.
But none to of that really matters if you’re uncomfortable on the bike with a wider bar, or if the style just doesn’t work for you.
Most people could over time adapt to almost any kind of set up (within reason, I.m not talking about drop bars for example :lol:) and find that they are riding at close to their maximum in terms of speed/efficiency/control even if they never quite squeeze out 100% of that.
Personally, at a shade under 6ft, I find a 750mm bar perfect and I’ve been riding this width for about four years now. But for me to say that everyone else should also be riding a bar this wide would be like me saying everyone should also hate marmite because I think it tastes like a racoon’s arse.
Yes, there are sound, scientific based arguments for wider bars. But the only way you’re going to know if you can take advantage of those is if you try it for yourself.
Buy a cheap wide bar, say 750mm-780mm (only because that’s the default width they come in these days) and see how you go, cutting them down as you prefer.