A commenter asks:[In writing questions presented and issue statements] is there any historical or legal reason why (some) lawyers try to cram everything into one sentence? I have noticed that this unfortunate custom prevails also among lawyers from other, non-English-speaking jurisdictions, which appears to indicate that there must be some method to this this madness.
I was taught to do it that way in law school, and I taught my students to do it that way for several years. It is also a common convention in legal writing today.
So we were taught that way because it was a convention, and it was a convention because we were taught that way.