I pay for that, because YouTube and YouTube Music is the main source of media for me And my family and I have no issue with paying for a service that I use a lot. And paying for that is so much easier then investing huge amounts of time into searching for and maintaining alternative Players and Tools for all the different devices where I (and my family) consume YouTube and YouTube Music. My limited time is more valuable for me then the price for the service.
And how do I install uBlock origin into my living room television? How into the YouTube app on my Chromecast? Sure I could use Firefox on that but that will break any chance of sending YouTube videos from a phone to the Chromecast, so not really a valid option. How into the PS5? How install it into any kind of mobile apple device? How into all kinds of mobile YouTube music applications? Yes, it is easy when the only way to consume YouTube is via Webbrowser and even that gets more and more complicated whenever google changes something to block ad blockers.