Most people can enjoy things that could harm them if done in excess without a problem, it is just that the cases of the people that cannot do it are so prominent and impossible to ignore, that it may seem as if this could happen to anyone.
But this is not really true, most of those that become addicted and suffered negative consequences had a predisposition to it already, so as long as you do not have it then you should be able to gamble without suffering any major setback.
If someone engages in excessive gambling activities, of course over time he will feel uncomfortable because excessive activity is not in accordance with our abilities and the results will not be satisfactory for us but will be a matter of regret.
Yes, gamblers who are addicted will certainly feel satisfied because just by gambling they get pleasure even though they often end up losing, but for gamblers who are not yet addicted, this is a problem for them.
Basically everything that is done in excess will always be bad, or the meaning will usually always produce bad results and this applies to everything and not just in gambling, but if you take it and apply it to gambling activities then of course as you say that over time anyone will feel uncomfortable, this is gambling which is an activity that only provides "possibilities" and nothing more than that, and obviously it is very natural if in the end there are some results at the end of the session that are not what you expected.
Gambling has absolutely no element of certainty whatsoever that can guarantee you a win at the end of the session, it will never be known unless you have completed the game which means that your excessive actions with the aim of getting a big win will actually only make you feel more disappointed, that's for sure, because you put excessive hopes in a place that has absolutely no certainty. On the other hand it seems that your statement is reversed my friend, there is absolutely no pleasure in the situation of addiction, and you have also said above that they will only suffer a lot of problems as a result of wrong gambling, there is no pleasure at all in the defeat that dominates.