My compatriots here in our country also believe that money you didn't work for is something you won't regret spending, but if you or we worked hard for the money we earned, we will feel like spending it in vain. In short, this thought that you mentioned is really true.
That's why, when I play gambling, it's right that I followed what others said that you should really only gamble with a limited amount of money. Even though I didn't receive anything from the casino during the time I was playing crypto gambling, it's fine with me too.
I understand the point you are driving at but in as much as you had an easy money you did not work for shouldn't be a good reason to use it aggressively on gambling because sometimes with a proper use of free money like that you could possibly use it and get more money, though emotion you would have if loosing the money you work so hard for and the emotions of loosing free money that was given to you will not be the same but whichever way you should have some limited amount you would use on gambling whether the money is free or not because it will help you reduce the amount of money you would spend while gambling.