You keep speaking in extremes and absolutes. There is also pornographic content walking outside on the street in the city if you so wish to classify it (and some people certainly do to they point where they get turned on by seing a bare ankle).
Certainly the pictures and videos on wikipedia which you chose to consider pornographic rather than neutrally informative have a different set of qualities then what you would find in the extreme sections of porn-serving websites.
There is a middle ground. You can give partial access. And age verification is one more tool for that (we already have parental controls for routers and mobile internet simcards and smart devices)
I don't like nor want age verification btw. I just don't agree with your arguments against it, because I find them weak.