Not a big deal at all. Schematics only show how to connect the various bits and pieces. Maybe there is one or two things that were secret before, but anyone with a little time, a scope, a voltage meter and some time could have figured out how most of it connected anyway.
And they also show what those bits and pieces are, which is actually quite a big deal, because the components often have non-helpful labels on them (like "Apple" "some internal ID"), which makes it almost impossible to find datasheets on them or source them (say you want to replace a component on the board that you suspect is broken).
So not really sure what would have been a big deal if not this..
(serious question)