I am 100% sure that these are far from the main reasons and not reasons at all, these are consequences of other things that happened to him (maybe a tragedy in the family or something else). The owner of a multi-million dollar business is obviously a disciplined, rational person who has seen a lot in life. If he had been exposed to alcohol or unreasonable risks, then he simply would not have achieved what he achieved. The part of the story that we learned is only part of some other story that led him to this.
I can't say anything about it as it is only speculation. A person can have a business in various ways, for example, inherited and it is not a fact that the owner is a disciplined person. I am sure of one thing if he did not drink alcohol while gambling his mind would not be so stupefied and he would behave very differently. I think everyone has seen people in a strong alcohol intoxication and knows that in such a state a person can not normally manage himself, I'm not talking about money or risk management. Alcohol and gambling in my opinion are incompatible things for a disciplined person.