The Google ad happened to match my preferences, sure. I would've noticed more if the default was different.
But just because I live with ads doesn't mean I like it. I'd much rather pay Google a flat fee for all of their services for the assurance that I will never see an ad and my data is not used for their mining.
The google default exists until you change it.
You have already been living with ads. But the google ad was not explicit.