Earlier quoted context omitted.
Can you elaborate a bit? Why would that make my attention more valuable than other's?
If you are a paying subscriber, you are self-identifying as (likely) a higher net-worth. The problem for ad platforms allowing paid opt-out is that the most valuable users leave the network. Then they have to go to advertisers and say, “advertise on our network where all the wealthier people are not.” A brand like Tiffany’s or Rolex (both huge advertisers) aren’t going to opt into that.
Apart from that, you can bet that YouTube is pricing it in a way that they aren’t losing out compared to ad revenue.