Who would pay to watch ads? It should be free or not offered at all.
Millions and millions do and have for ages. A pay/ad hybrid model for content has long been the norm for newspapers, magazines, and television. Streaming services like Disney+, Hulu, HBO Max, Netflix, and Paramount+ also offer pay ad-supported plans and others are likely to in the future.
The good thing here is that a Netflix (and some other streaming service) subscriber has a CHOICE of going with ad-free or saving a few bucks a month and going with ad-supported. With newspapers, magazines, etc., you typically didn't have that choice e.g., there was no Time magazine with ads and Time magazine without. You paid for the content AND it had ads.