May well be, but that still means that non-extreme-ads are on the way out...

People used to really notice when a movie, TV programme or video game was violent. Blood, graphic death, etc.

As those things became more common and more extreme, people stopped noticing. Now we don't really talk about it at all anymore.

Does that mean non-violent movies and video games are on their way out? (No it does not.)

And yet, the raison d'etre of movies and video games is not to be noticed. For advertising, it is. If the non-extreme forms of advertising are not being noticed, it means they are indeed dying out.

The purpose of advertising isn’t to be noticed, it’s to make people give you their money. It’s an open question whether being consciously noticed is a prerequisite for this or not; can ubiquitous but ignored Coca-Cola logos successfully change someone’s answer to “What would you like to drink?”

Your line of thought here has its own merit