Obviously some percentage of players become addicted.
The percentage, however, is significantly lower than those who become addicted to alcohol.
Or nicotine.
Or any of the drugs I fooled around with in my Hippie days in the 70s.
Or chocolate, or coffee, or whatever all people get addicted to.
Gambling addiction is a very tiny portion of addictions, and the good news is that it is completely curable and there are many many places that will cure you for free.
Responsible casinos have a link to gamblers anonymous, and it would be advisable for us to do so too.