If I open a new YouTube page incognito, I am not asked to agree to any kind of TOS. I agree to nothing, I merely start watching videos. Where is there a requirement that I must watch the ads if I have never agreed to such?

Even then, I bring this all up as a YouTube Premium membership holder, someone who has been paying for YouTube Premium since the very day it was announced as YouTube Red! I am also a sponsor block addon user, so I skip the "this video is sponsored by Stupid shoes" or whatever, read by the creators. According to you, am I stealing money from them as well, somehow?