They bundle YT Music in your subscription because they wanted a share in music streaming, invested in an infrastructure on their platform and then realized that their service doesn't offer enough to make people want to use it over their competitors' music streaming services. Instead of taking that loss or making their service worth using, they bundle the shit nobody wants with what everyone needs and use that to justify a price hike.

If there was a basic subscription that just removes ads on the videos I click on without any other useless crap attached to it, I would pay for that. But no, it's predatory, anti-consumer bullshit, so I just block their ads.