Do I reckon I could write , or be part of a team to write and arrange a song that could be a top hit , yes, I believe I can and have done
Would it be a hit in reality, NO of course not
My ego would like to think its because you have to be right place right time, right contacts etc. to have succeeded or succeed from now, maybe thats a small part of it .
With regard to muso's stating they are above this, most top commercial acts, at least a few decades back, almost all started out as talented parts of great acts, then saw the commercial dollars in writing pop, those ranging from Lionel Richie to Gary Numan and many others are open about that fact and don't try to pretend otherwise.