I can see the point you're making. What i think you may have missed is that 'pie in the sky' victory, for example at a WSOP event. If you win $2 million, that changes your life! So essentially poker has made your life. Thats something to consider. But as you say i think essenailly most people who are going to make a living either play mtts and win big prizes regularly or can absolutly destroy say 100NL and 200NL ring 5 tabling turning over a lot each day.
I'd like to think that i can get a norml well paid job from my education and play poker for example on an evening or at weekends and play in big MTT's hopefully cashing a few big prizes. That would be nice