If I chose to start my career in gambling, then I would choose something that requires intellectual effort - either poker or sports betting. It seems to me that such an activity is less dangerous in terms of addiction, plus it makes sense, unlike slots where you just need to press a button. As for profitability, I would not count on it, first of all, this is entertainment, and a very small percentage of all gamblers win.
You have good self-control to avoid gambling addiction, soccer gambling is more precisely a hobby developed based on interest about football, then it can be increased for profitability on gambling platforms, but for slot games it seems unfair because it spends time only to lose.
And some of the gambling games I've noticed up to now are just football betting which I don't think will make a person addicted to it. Compared to slot games and others that tend to use games at a glance, of course someone's psychology will be easily attracted and will continue to try. While football betting, as you said, is based on hobbies and even interests, the level of addiction will be minimal.
If you will make sports betting as your career, you do have the chance to make it good if you know very well know the sports.
Unlike with usual casino games, which are mostly based on luck. This for me, is not advisable to make a living out of it.
I can agree with sports betting, as some people already shown that they can make a living out of it.
But with luck-based games, nope. You are basically depending on your luck on this one.
Whereas, with sports betting or poker, you are depending also on your skills and knowledge.
The luck is still part of it, but you have better chance of winning if you know the sports.