I am probably one of those. I posted about daydreaming the other day. Even mentioned I may have ADHD. For me I have to study and read long passages in the morning. I also take short breaks between. Most afternoons, like this one, I am almost useless for reading lengthy and dry stuff. So, I stay away from my academic studies if it is a course that bores me. If reading in the afternoon it will be short articles or posts, like here on Hive.
It wasn't like that when I was younger and working. My mind would wander alot as a teenager though, and it does now that I am retired. But I think it does it for different reasons than when I was a teenager.
It is funny though, because writing is the opposite. Once I start writing, I get in a zone and rarely get distracted.