I don't think you understand what training to be a competitive cyclist looks like. 15 ish hours of relatively constant power per week sounds about right for base phase, which tends to coincide with winter. This is different from rec riding.
Doesn't work well when you have a busy family life. I would argue that anyone doing 1200km a month is not a casual cyclist, and if you have a partner, they need to be fully onboard with your "hobby" time commitment for something like this to work.
