First: never, ever listen to parents and the likes if their ideas about your life seem to be about steady incomes and security and that kind of stuff. You'll always regret later.
Then it's better to have tried and to have been proven wrong.
I don't know whether my reasons are interesting to you, but just in case:
The choice to not pursue a career in music took almost two years to make, as a joint decision between me and my wife. She'd accepted becoming a musician's wife, so that element was not involved, and we lived off my income as a musician for some three years.
But we'd moved from the culture city of Rotterdam to a rural area in Norway, and found life there was better. My music career would demand moving to Oslo - another "big" city.
We decided the totally of living ruraly was worth giving up a music career for. We loved the notion that walking in the forests or swimming in the sea were options that cost no money, and were right at our doorsteps. Oslo would mean using money for the tram, bus, museum, concert .... whatever.
Another aspect was of more psychological nature. I feared my being a composer would reduce me as a husband or father.
I've known "all my life" that if I met a nice girl, I'd probably have to give up a career in art - even if not giving up a career in music.
I trust this doesn't go for most people, but I do believe it was a valid point in my case.