My point is simply that Google is providing something which costs money to produce. They offer two ways to pay for it but someone who rejects both of them has no reason to expect Google to subsidize their activity – it’s like whining that the concert hall closed the window you used to camp out at for free music.

Customer is generally whoever is giving you money. With YouTube ads it's advertiser with the viewer being a second customer as the viewer gives YouTube the attention/click through. That falls apart if the user refuses to engage in that transaction