For me, it was my school's enforced reading and book reports that taught me to skim and just pick up enough info to write a report, and the internet was ultimately what restored my capability to read and attention span, as I could find things that genuinely interested me.

Obviously, the internet has changed a lot since I was a kid, but I'm not entirely sure that there's just nobody being exposed to larger amounts of text and that few people online have interests greater than TikTok.