It's simple; the higher the dependency on luck, the more foolish the gambler is, and the lower the chance of winning, the less attractive the bet should be, and vice versa.
I totally disagree with your point. A gambler that depends on luck is not a foolish gambler rather he's someone I'll actually classify as a realistic gambler. There is virtually no gambling activity that doesn't involve luck because if it never involved luck it won't be regarded as gambling in the first place.
Getting accustomed with betting tactics doesn't necessarily mean you have a strategy that's guaranteeing your win it only makes you turn the odd for yourself as much as you can which in the end still could go sideways if you run out of luck.