I don't think I play on average more than 10-12 hours a week. That excludes organ playing, max. 5-6 hours a week but sometimes far less.
Extraordinary fast musical perception, sight reading ablities and intelligence, altogher aka talent is the only explanation for your huge output. If I see myself, almost same time bit differently distributed (around 10 hours a week organ playing, and 6-8 hours piano playing, occasional some weeks gap for solely guitar playing however). And during the time I post one piece you post 20 or even more. On the Chopin Ballade1 I hang on since 15 months now