But playing left handed was completely natural to me and flipping was no marginal difference, it was very awkward and I'm certain I would have progressed in a completely different direction musically if I'd been permitted to do what came natural to me.I think you’re overthinking it. There are no left-handed violins, violas, cellos, contrabasses (nevermind pianos, wind instruments, etc). And if I remember correctly, there was a study that noted the percentage of left-handed concertmasters was higher than left-handed people in the general population. If anything, it’s an advantage to have the dominant hand on the fingerboard.
As a righty, playing guitar has made my left hand almost as dexterous as my right. I still can’t write with it, but I do/prefer a lot of stuff in daily life that non-musicians who are righties don’t do with it.
Playing an instrument is awkward in the beginning, so flipping it at that point in your development probably was just a marginal difference that would even out later anyway.
What ended up happening is I made very little progress, struggled with the right handedness (but at the time just thought this is normal, never questioned the decision) and then gave up for a long time. I had been hoping to some day get a band going with friends, but that never materialized, etc etc