It's not even about "pro" betting for 90% of us. We have jobs, I'm totally cool working for a living. I got away with selling weed for many years. That said, yes, there is a 10k minimum bank I start out with for football and usually make around 5-10 k from football season. I'm totally ok with that. I consider myself a professional football bettor as a result of my winning % Is it my only source of income? No, and it doesn't have to be.
If JJ really gave a F*** he would be preaching that you actually need to maintain a secondary job or income source and sound money management even if you are betting recreationally. That way you always have money coming in and don't ever get fully buried and can always bounce back.