First of all I want to congratulate you. This is the first ever decent threat that I ever saw in this 100% spam board.
I didn't read everything yet, but I will.
Also doesn't it bother you that your "job" doesn't add any contribution to the society? I mean you're taking money from the casino and that's it - playing your edge. At least a trader provides liquidity in the markets for the hedgers while a gambler doesn't have much impact unless you do something significant with the profits which is another story I guess.

This is a good question and I actually have thought about it often times and talked to my fellow punters about it. Since nobody asked so far, I wanted to do a post on my own about disadvantages about being a pro gambler anyway - and not contributing to society would have been one aspect - but will answer this very aspect right now then.
Being a pro gambler really adds nothing to society in the end. I am mainly doing sportstrading nowadays, so in your view, I at least add some liquidity to the markets, but this doesn't add anything to society too in my book. And on top of that, I am not taking any money from casinos (bookmakers in my case), but actually I take money from other people. It's not the bookmakers that pay me, but I get my money from other peoples losses (a lot of them probably addicted gamblers, i.e. sick). Not very nice.
I have a few comments about this subject.
There are many professions which do not contribute anything to the society.
Many bureaucrats for example, they only drain from the society. Specially here in brazil and other poor countries. But most of those bureaucrats think that their job is important, while nobody would care if they just vanished.
Being a gambler is different because you certainly don't think that you are doing something important.
However, when I read your comment and you said your money comes from other players I thought:" well , this guy is contributing to the society after all"
People are freely giving you money just to have some fun. They are playing a game , which they will probably lose because they are amateurs, but they are fine with that.
I have some friends who visited Las Vegas to have fun. They separate a stack of money to gamble and that's it. They were happy to have someone to play with and they were gambling that money.
So, somehow your contribution to the society is in this "fun" industry.
Now I will make you a question ( I don't know if it was answered already)
You said you are doing this for 15 years. So you are not a kid anymore.
Do you have plans for you retirement? Do you have kids? Do plan on having them? Would it be possible to save for retirement and to grow kids in your gambling style and strategy?