I strongly disagree with you and everybody else that thinks like you.
First thing that I don't agree with is the "fear" mentality that you are indirectly promoting.
What you've mentioned in your post can apply to every single BUSINESS or JOB in the world because there is no certainty for noone on this world (except for the private owners of the US national bank) and if we follow this advice of yours then all of us should just paralyze from fear and do nothing, because everything is potentially leading us to disaster.
I'd rather follow and give the advice:
if you don't know what you are doing, then don't do it.
And if you want to ever start doing it, learn how to do it right and then and only then start doing it.
The case described in Kav's post is classic gambler's case:
this boy, without learning in depth the BJ, invested his money and started playing it. And for the things to get worse, he played ONLINE. Even if we are not talking about RNG BJ (Rigged Numbers Generator RIPOFF haha) but live feed, playing BJ online is damn risky because there are no ways to prove that the casino is cheating on you or not. Hint for every unexperienced player: If you think that gambling commissions based in Curacao or Isle of Man care about your ass - you are dead wrong because they are not: they are just another piece of the big money puzzle where the-big-numbers-players dictate the rules (and change them whenever they like it).
The second that I disliked in the post is the shallow market targeting and discrimination of the players: I think totally the opposite, it is wisely to become pro if you are unemployed or student then if you already have a job/business because when you are unemployed/student you got plenty of time (actually my passion for roulette started developing when I was back in college and I was analyzing the French wheel while sobering after hard partying and it worked out better then a coffee or a morning sex) and you can invest that free time into learning. I'm discussed when I see someone who is currently unemployed and he is just sitting somewhere, in a cafe or local bookies and waste WHOLE day there just talking nonsense and wasting his dad's money without LEARNING ANYTHING.
Only knowledge beats fear.
And fear is the worst of all emotions.
[mod edited for profanity]