Agree. Gambling is mostly about the luck factor. Even if the strategy and skills can have a role, the luck factor seems to have a bigger role. So, we can't be too optimistic about the possible result in the gambling games. There is no certainty in gambling games, we relies on our luck at that time. Considering this reality, it is true that we can't gamble with the amount of money that we don't afford to lose. The chance to lose money is quite high, so we must use free money only. Sure, for many gamblers, they have the limits for their funds. So, we don't spend the money excessively.
There is no two ways about it, gambling is based on luck, and this is why people don't need to push themselves too hard because no matter what strategy they want to use, there is no way that their hope will not be based on luck. The only thing they need to focus on should be based on luck and and when you lose money, there is nothing you can do about it other than to just accept your fate because it does not change anything. Gambling is tricky, so your mindset will determine how far everyone will go. So it is very important to be serious because it will take more than it will give, and people need to know this.
I think the opposite of what you said about gambling being too serious and giving too much importance to it. When you give too much importance to gambling, it will make you addicted. Just as you would seriously think about the team's victory when you go to play football on the field, gambling should be the same. Just as you should be careful not to get hurt while playing strategically on the field you should also play for fun and give much importance to financial management and bankroll and reducing losses when betting on sports. Relying on luck will increase the tendency to lose money because you will be playing depending on luck instead of researching to win each and every bet.
For this reason you should play with the effort necessary to win without feeling like you're overexerting yourself. Prioritizing fun in the game will reduce the risk of losing money and mentally prepare yourself for the fact that luck won't always be on your side.