Most of us probably would stop at making like 1 ethereum, let alone reach to 30 ethereum levels, all in all this person knows their limits and tested it and failed, now at least they learned something. I had something similar back in the day, not as big as him obviously because I am not that rich at all, but it was the same idea with the amount I had so it works out pretty similar.
Mostly but there are still gamblers who would stop at the certain limit that they have set once they've win it. Just like me, I don't set too much expectation and amount to win. Learning from the experience of other gamblers is suitable for those who don't want to do the same mistake.
I had a certain amount of money I earned from somewhere that I could have used very well, but it was from a casino so they put it on my account and instead of withdrawing like a smart person I gambled with it instead and earned more than 6 months of salary for me, and I lost it all of it. It really teaches you to be more careful about gambling and never had similar problem ever again.
It actually does teach a lot of lessons when you were able to go through this situation.