There's a lot more in the link.
But I think the question will remain: Are the gambling advertisements really causing harm or not?
From my experience, they're not causing much harm, maybe they are to impulsive gamblers, but not to casual and non-gamblers. In the past, before the advent of TV and TV commercials hosting these ads, there has been gamblers and gambling addicts. What is even causing harm in this era is online gambling and casinos—especially unregulated, no-kyc casinos—which makes it easy for underage individuals to gamble.
This
research shows that what influences people (non-gamblers) into gambling are primarily peers and social groups. Ads only affect gamblers—especially impulsive gamblers—much more than any other person. This
research highlights that exact point.
And these hold true because: from my experience, before I started gambling, I had no grasp on the various terms and options in gambling. I didn't know what over or under 2.5 was, I didn't know what 1 X 2 was, I had no idea about anything, and gambling ads can not give you these. These concepts were explained to me by a friend, and I was never for once influenced by any ad, and up until now, I'm not influenced by ads—I won't use my individual experiences as standard, but it conforms to the research stated above.
So yeah, ads while being harmful to impulsive gamblers—which they'll go ahead to gamble anyway, with or without an ad—is not all that harmful to a non-gambler or a casual gambler.