I just read poker in the OP I guess I'll ask things in regards to it.
1. Do you believe that your hands are just pure luck or it really has to do with strategy or involving math skills?
2. Which one you make money a lot easier is it from poker or from trading (feels like I'll include this to make some comparison)?
I don't play poker for a living and never did, but I thought about it. I said in the OP, that poker is the only gambling game apart from betting, where you can make money longterm. So to answer your question, I make more money with betting/trading

In general, you can make good money with both, it depends a bit on your personal preferences and abilites, which one fits you better.
Your poker hands are just pure luck short-term of course. But over a big enough sample size you should be dealt the exact same cards as all your fellow players, so we have a level playing field. The question is, what you do with your hands and how you play them. That is where the math comes in play and the ability to read your opponent.
Great thread to read as my first one coming into the Gambling section. Being a professional gambler yourself, I am sure you have dipped hands into almost everything from dice games, poker to slots, maybe in both the online as well as real-world casino format. So here is my question.
How would you describe to someone about the world of gambling including its value as entertainment as well as a source of income, like in your case.
PS: You described the sports betting and your strategy towards it in one of the answers. It seems a big part of it is actually watching a lot of sports. So, Watching sports and then earning money off of it, you have done quite well..
Actually I only ever invested lots of time in betting. For poker I read some books and played a bit with small-ish stakes, but not my game in the end. Never played dice, and slots only, when I got some free spins from bookmakers. I was in a real life Casino only once and don't think I will go there very often in the future.
Your second question is a bit unspecific, so I am having trouble to understand what you would like to hear. I already wrote a lot about intentions, how it all started, about the fun/money relation and all those things. Maybe scroll a bit through this thread and see if that answers your question. If not, just come back

This is a bit off-topic, but everyone who is fascinated by the "world of betting" and likes to read a bit, should have a look at "Game, Set, Cash!: Inside the Secret World of International Tennis Trading" from Brad Hutchinson. It's about courtsiding in Tennis and taking advantage of time delays in TV broadcasts. It's an easy to read and understand book with a lot of fun stories of a young man getting paid to travel the world and working for a gambling syndicate.
https://www.goodreads.com/book/show/22226468-game-set-cashI am not earning any money by mentioning this book here nor do I know Brad. I just recommend it here for interested people, since I have had so much fun reading it (and did so already thrice).