~snip~
I haven't seen anyone taking up gambling as a career but I have seen many taking it up as a pastime to spend their free time. To make gambling as a career, regular income from gambling must be possible, which is not possible at all from gambling. So no one wants to accept this uncertain possibility as an integral part of life. If there was a guarantee of payment, maybe many people would take up gambling as a career.
I mean, there are a few individuals who have made money gambling, like David Walsh from Australia.
But those individuals are extremely rare, and they simply got lucky, as well as also put a lot of effort, money, and time into it.
Others have put the same or more effort and end up without anything. That's actually the most common way of going.