Sometimes it’s just a different starting point. I was 5 yrs old when my parents signed me up for piano lessons. Back then, the piano repertoire being taught was about 95% classical music - a form of music I had never heard before. My parents weren’t into classical. There was no internet to turn to. So I learned to play my first instrument from the standard notation of music that was completely foreign to my ears. I never questioned whether this was a good or bad idea. I just loved making music and absorbed everything my teacher introduced me to. That set the pattern for every other instrument I took up over the years.
I’ve been exposed to a lot of music in my life, and a lot of it has been original harp music written by other people. No videos or recordings exist for many of these original pieces, so it’s quite likely I don’t play them exactly as their creator intended. But it is within the original music that I have found some of the most remarkably beautiful, satisfying, and emotionally moving tunes. Tunes that have sustained me during difficult times. Tunes that still make me smile when I play them. Tunes that have made my musical life richer. I do love familiar songs, but my musical journey would have been a much poorer experience if my repertoire had been limited to only familiar tunes.
But that’s been my path, and I firmly believe that people should play the music that interests them, so carry on, Oldscruggsfan. It’s your journey (and Howling Tom’s). Do what works best for the two of you. Life is too short to do otherwise.