I hardly consider this a "gotcha" moment since nobody attempted to trick you into anything. You've discredited yourself by your own lack of integrity having failed to take a principled stance against a behaviour on which you publicly claim to have a negative view.
Of course, he is mainly referring to the people on the extreme part of the spectrum and not the majority of occasional gamblers. Despite the fact that he thinks negatively about gambling in general (which I do too) but that's besides the point here. The whole signature situation is a funny coincidence but that doesn't mean he has no integrity or makes the statement less valid. That's like saying that someone who works for H&M must have nothing against child labor. Gotta do what you gotta do to get by.
An addiction is a chronic disorder - a complex disease. People with addiction need treatment rather than your moral judgment of their character.
If you were brought up in an environment where this was never a problem and for some reason still contract the
'disease' and let it escalate to the point where it is everything you do on a day to day basis. Then it's your OWN fault and I have 0.0% pity for you whatsoever. If you know what the risks are before you get into it and still get addicted to it and lack the
character to get out of it you ARE a degenerate.