I think that this is a state of naive belief that exactly half the time a gambling player will win and he will be lucky because the money won during the period of luck will be much more than lost, this period passes as the given player gains experience in gambling. And for most players who start playing a lot and often, this period is not so long. Realizing that it is a pleasure to gamble and simply pay for the pleasure received is a much more reasonable form of player behavior. And accordingly his individual perception of the game process.
I think that all normal players should think this way and, accordingly, should not feel too sorry for the money they lost.
I agree with you. Those who gamble to earn more money are wasting their time. They think luck can give them bigger money than the losses they have experienced. This is the same as a thread here that says there is someone who gambles every day because they don't want to miss a lucky day. I think it's all naive thinking about how gambling should be played. It's just a game and you pay to play. If you are lucky you will get a return but that is just a bonus. You can consider the money you have spent to enjoy the game, not expect a return.
This is the correct observation that you make.
I also think that money won in gambling can be considered as just a bonus when playing. And all your other expenses are really just payment for the pleasure of the game. You should treat your game as a paid service provided to you. At some point you wanted to have fun - you will enjoy gambling, and the casino will receive some of your money for providing you with such an opportunity. With this approach to the game, the player always becomes much more satisfied, and, I would say, calmer, although he certainly retains the emotions from the game itself.
In my opinion, this is clearly the best option for your attitude towards gambling.