Agreed, it can be done. I've read books on my 6s+, 8+, and Xs Max (when I had to travel for work and didn't want to carry an iPad and work laptop). It's very doable.I wouldn’t purchase one JUST for reading as an IPad is just cheaper and larger. But if you want a new daily driver which can also be used as a book reader then I dont see why not.
I just ... .... I just wish Apple Books would use all the margin space for text like Kindle/Libby.