Spotify Premium Family is £18pm. YouTube Premium Family is £20pm.
So I view it as £2pm to remove YouTube ads for the whole family as well as enabling YT offline and background play.
I think that's a good deal, particularly given as a family we watch more YT than any other TV service, however if you're not willing to pay for a music service I can see how you might feel differently about that
Or you simply don't pay anything at all for either service by downloading add-ons that unlock Premium
xManager & Revanced on Android, literally the only reasons (+ Stremio) I will never buy an iPhone as long as these services exist. You save hundreds of dollars every year. Revanced has more options than YouTube Premium too, like automatically skipping sponsor sections.
I'm all for paying for the media I consume, but I will never pay for YouTube. First and foremost, I don't think they pay artists enough, which is why I buy all my music albums individually on services such as Bandcamp.
Second, I believe Google is working hard on turning the internet into a privacy violating walled garden riddled with unblockable ads, where all relevant technologies and standards are de facto controlled by them. I use uBlock and reVanced to block ads on YouTube and pay content creators through Patreon because I WANT to hurt Google financially by spending their compute resources without giving them ad impressions. I think everyone should do the same.