If you do believe that then let it be because there are some people that doesn't want to quit their full time jobs even though they know some serious way to get good bitcoins and able to support their daily lives with it. Because they know that if they have a lot of source of income that is going to be the best way to help them financially.
It depends on persons perception on how he gonna plan his future some may intend to play safe and remain on the traditional way on earning money because they dont like to risk to switch into bitcoin and some dont hesistate to switch as long he earn decent amounts compare to his job. It really depends on how people would apply it .
Yeah i think before you think about quitting your job and going full time bitcoin you should have a plan. I myself am planning to go fulltime around early next year so now im trying to study all other ways to earn on bitcoin and the possibilities are actually inviting