That’s because they still have a financial incentive to do so: Google doesn’t offer a fully paid version of their service

I totally agree. I am a Youtube Premium user for this exact reason. No ads means less financial incentive to track me (I remember a statistic where one user was worth 4cents per year, could be wrong about the exact number though). In a perfect world we would habe monetization networks instead of ad networks, on a pay per view or subscription model instead of ads. This would not only make the companies more money, but also reduce the incentive for them to track you (I would even claim that unnecessary tracking would hurt their business).

We can either have a free (as in no costs) or a free (as in liberty) internet, not both

Because sometimes the same word can mean different things.

German has „Der See“ and „die See“ (the lake and the sea) Or even more extreme: „Band“ can describe a music group, a book or a tape.

You just reduce the need for context

I remember a study that gendered articles slightly increase understandibility among native speakers.