I'm surprised you're finding it that much in print books. I read voraciously, print and e-books, and can't say that I've come across that as a general trend. Maybe you've been reading poorly edited books? Either the author or the editor should have noticed and changed the sentence structure on re-write.
And there's always the possibility that the similar words would line up under each other, making the page look, well, weird. Though e-book editors don't usually get to see how words line up in the final e-book.
Does this answer your question?