Yes, which is why I use paid-for OSes and browsers, instead of free ones like Linux or Firefox. I don't want to be the product.
With Linux you can control up to the detail any auto-update, and any update in general, all the way to being able to inspect the code.
Why is nobody building a paid for browser with built in search engine and LLM assistant? Should probably make it open source for transparency. And before anyone says you would build/compile it yourself if it was open source, those ppl are already running their self compiled tools and are not the target market.
You are still the product with commercial OSes. Paying doesn't stop them from shoving ads and telemetry wherever they can.
I think with Windows you probably are the customer and the product