Everything that has an advantage also has a disadvantage. Before online gambling started becoming as popular as it is today, which many can link to the COVID-19 spread that restricted people from leaving their homes, physical casinos and betting shops had also been producing gambling addicts.
Anyone can get addicted to whichever means they use for gambling; if you don't have self-control, you will get addicted even if it costs you a whole day to go and gamble. Some people won't mind as much as it's going to satisfy their gambling urge.
To be honest, you have already said my words on your post that, "everything has an advantage and also has its advantage."
I think the big advantage of online gamling is it is easy to access and easy to play and easy to afford and also have good privacy. And I think these are the also the disadvantage of online gambling, because of just easy to access people are getting touch into it and those people who don't have control on their emotions they get addicted to it day by day.
So I think yes obviously online gambling lead to more addiction.