The first people who bred fish didn't have anyone to learn from yet they succeeded so the hobby can still advance without us giving cheat sheets.
This is after all, still a business and giving away all your secrets is not good for business.
That said, for those who want to learn and put in the time, there are mentors ( such as myself) that are willing to work with you. But that doesn't mean it's easy or even free. I've had to pay for every mentor I have had for everything except fish breeding because it was a family friend I learned from. Since then, I've NEVER had anyone offer to help me breed for free.