Earlier quoted context omitted.
The article doesn't distinguish reading books from reading anything else. Though it's pretty short and light on details. The article it cites strongly implies the reading is only books. All that said, [I find] reading books is overrated. They're often outdated, low effort slop, and even more so in this AI era.
How could fiction books become outdated? That is an absolutely alien opinion for me! -edit- I said "non-fiction" when I meant "fiction". Of course non-fiction books become obsolete quite fast sometimes.
For those who put in the work, there isn't even a cultural bond to enjoy since most of the people who originally consumed those works are themselves dead and buried. (Modern niches and widely studied "classics" notwithstanding.)