>Lots of complex preconditions, trying to find clauses that catch all side effects - sounds familiar to me.

I think there is another benefit - in that if you have some legal background (not much needed, some business law courses and basic familiarity) then when you are looking at code that you can't figure out why did they do this and think I will improve it! Sometimes the reason they did things in a weird way is because of regulatory requirements and you might be better able to notice those situations.

Also when you are planning features you might be able to determine this needs to be ran past legal more than other developers (at least I've had this experience a few times)