Making money is, at the end of the day, like the oil seller

You either make consistent profits on a few specific instruments, or you make consistent profits across multiple instruments using a fixed approach. Those are the only two possibilities.

You can't possibly use every method to reliably make money on every instrument.

There aren't really people with fixed strengths or weaknesses. At the end of the day, it all comes down to one thing: some people genuinely want to get something done right, while others just want to coast.