Can you guys believe that there are people (gamblers) thinking these way?
The notion of thinking this way isn't a taboo. I believe gamblers think in such manner.
If you see a gambler with such mindset, will you advise the person or just allow the person to learn their lesson?
No. If a gambler is an adult then it is assumed they are acting in their sane capacity and should know the way that they have planned their gambling strategy.
Have you had this kind of believe before now, probably when you newly started gamby?
Nothing bad to think in that way actually because you have to also believe in what you do for you to be successful on it too. Although it is good to know what you want to achieve and you have to follow it outrightly. It is about confidence boostering to give yourself such believe and that makes you to have the moral to keep trying to win. In any case, it is still good to know when and where to draw the curtains when you are not yet winning.