I think the recent difficulty people have with reading books stems less from dopamine addiction and more from the sheer abundance of content more appealing than books.
Even when books were mainstream, there were always people who preferred television or comic books. Nowadays, it's even common for people to buy books based solely on the title and author, then take a photo of their purchase and upload it to social media as their goal.
I heard from a friend who works at a publishing company that these days, books written by influencers sell better than those written by professors or experts.