> What’s the issue with advertisement exactly?

Advertisement isn't showing you something you might be interested in. Advertisement is an industry of psychoanalysts spending untold man hours of effort crafting ways to psychologically manipulate the population into serving the needs of a given corporation.

Instagram doesn't just show you cool clothes you might want to buy. It leverages dark pattern ux to keep you engaged with the app well past any healthy duration, and shows you content designed to enrage or arouse you to keep you in a mental state that will increase engagement and possibly lead to you engaging in shopping therapy.

Advertising is releasing psychofauna into the world of YouTube kids to get your children obsessed with brand characters that they absolutely must have physical representations of. Or it gets even darker than that, look up Elsagate.

Maybe advertising wasn't evil when it was a sweet potato hawker shouting their wares into the market. Now it's an entirely different beast and it is anti human and evil.