...most likely ordinary players who do not have problems with gambling addiction will suffer.
I agree, especially those people that can take those losses ten or even maybe a hundred times the set cap by this regulation. I don't think they will be willing to face an ombudsman just to prove that they can take a loss since that might affect their persona negatively knowing that they are gambling like that and in that huge amount.
I very much doubt that people will even want to give out information about themselves that they actually play gambling games in online casinos. In society, as a rule, there is a bias towards people who play in casinos. Therefore, in some cases, even the fact that someone will know about your online casino games will be enough for a person to stop playing in an online casino.