Besides the thoughts offered by others here, I have yet another one; and that's that SOME people can either have so much stress going on in their lives at one times; or else can live under extreme, unrelenting, stress for so long that they simply can't always (if at all) concentrate to read "on demand".
I have trouble reading (and have for years - but some lives have extreme/bizarre stress for years, and that could be someone in your own circles).
My own "thing" is that I can sometimes read SOME things if the time is right (and believe me, I've never had trouble reading and have been not only an almost compulsive reader, but found ways to read when I had three young children, their medical stuff, educational stuff, and a whole house and yard that I took care of myself (did hire a lawn-mowing guy).
In any case, somewhere after the first twenty years of a bizarre mix of extreme stress, loss, and legal matters (not to mention still having three kids to worry about and watch go through things that really shouldn't have happened); I got so I just couldn't concentrate to read at all (I struggled with microwave instructions back then). Eventually, it got better enough that I could - if the time was right, and if I was calm enough - read some limited stuff. It's actually a lot better now than it was a few years ago, but it's still a challenge.
Just today someone gave me a one-page article published in a newspaper and written by a family member. It's an important subject, and I certainly care about the medical progress of the author; but even once I was home and in a quiet setting I just couldn't make myself read the thing.
And the thing is, although people in my life probably know I have SOME stress I don't really think anyone can imagine the degree and type and mix of it that I've lived with. So, I seem reasonably fine and can certainly write (put out information). So, for all the reasons above (and maybe this one too), don't assume your friends and/or family don't care. SOME- maybe not all - may care and not want to tell you how bad it is for them (if they have stress and can't concentrate to read any subject at any time).