1. In the beginning they may have been doing well financially and see no reason to gamble, maybe life later on throws them a financial curveball, or perhaps responsibility compels them to look for quick money through gambling. If not attempting gambling was an ethic for them they should have stuck to another alternative why did they choose this one?
2. On second thought. I feel it is the influence and conviction of people around them who are into gambling that made them go into gambling at the end of the day.
However, it is a sad story to see people who cast away gamblers thinking they are irresponsible, and then fund themselves on this same web doing the same thing. It reminds me of how vulnerable humans can be, and that anyone can change habits when a condition falls on them.
The reality is that many people like to see the problems in other people but usually are hard to find the same problems in themselves.
It's just a common thing. Similar to how it is easier to simply blame someone else for your problems.
Actually owning your life and accepting its challenges is not easy but it is definitely something to be proud of. It is what forges your life.