"yourbrainonporn.com" is about as reliable as quoting D.A.R.E. for information on drugs. In other words, it holds literally no weight and is likely religion-driven "family values" propaganda.

Just to correct myself, the page I linked to is actually about making the case for the link between dopamine and addiction. The effect of porn on the brain is made indirectly.

The site is founded by an atheist, and looks to science for making an informed view: https://www.yourbrainonporn.com/about/about-this-site/

Ah... Definitely good to call out. The domain looks like complete anti-porn religious propaganda without diving in further.

A lot of other things are also highly addictive though, like social media. So where do you draw the line? Also, why are some people so much more addicted than others?

That seems like equivocation on the word "unavoidable." There's a big difference between saying "ads are unavoidable because they are displayed on nearly every computing device you use" and "porn is unavoidable because people actively want to see it."