They prevent too much excitement as they always have that good control with both their time and finances.
There is no doubt about that, in fact there are players who have so much discipline that not even emotions are something that motivates them when it comes to playing, they only have the game to enjoy it in a healthy way , reaching that level is something great, but obviously to get there you need to go through many things, experiences that make us wiser and obviously will keep us away from addictions.
You are right, sometimes experiences can make you more careful about a particular thing, it's only foolishness if the gambler doesn't learn from his mistakes. Most of the valuable lessons that I've learnt are not from the mistakes that others made by my own errors. There are certain things that i can't just do now and that includes gambling irresponsibly or relying too much on gambling strategies to make profit
It's hard when you are the one that in situation, easy to say that control and discipline are needed, but when you are enjoying or when you feel something that increase the adrenaline inside you, it's a tough call to quit or stop your session, most of the time emotions really dominated your plans, you'll remember about your set limits when there's nothing you can use to play, it's just a simple regret that will remind you of that same mistake that you commit after playing.