You can't rely on luck for a living, so gambling should not be your main income, that's simple.
The gambling is based on the chance. You do not know if you will win or not in the next round. It is not a reliable source of income. It is better to find a proper job.
For some lucky people, gamble can be use for living and purchase anything you want include girl
Here's the lucky people for example : https://instagram.com/danbilzerian/?hl=en
Ofcourse most people have to loss since this is the risk of chance and house edge