First, let’s consider if it is indeed possible to make gambling a primary source of income.
In the end, while it might be possible for a small number of people to earn money through gambling, it's risky for the majority. Relying on it as a main source of income can lead to big losses.
If you don’t know what you’re doing, the odds are always going to be against you even if you start with a win at first attempt.
The result of this topic is that one should study what s/he is good at and what works for him/her because one man's food is another man's poison.
I know some people who are making a living out of gambling and despite knowing them I never imitate their potential what I did is focus on my path because imitation always leads to limitation or something worse.