Why is it that most users focus on the writing aspect and not the reading?

So I have noticed that most discussions on the Boox series tend to focus on the writing experience of the devices and not the reading of ebooks per se.
I wonder why this is the case.. for instance, someone in passing said "I use it for my writing, the 10.3 is too large for reading".. but is it?
I want a device I can use to read on.. so would 10.3 be too large? Do people read on their 10.3 note air or Go devices?