I've seen a 26' Riennell (sp?) with the aft bulkhead fitted (?) that way.
I don't know the reason.
The only one I can think of in your case
might be isolating hull flex from the sliding glass door.
If it was me, I would beef it up to eliminate that possibility. I would not want
that cold air, let alone water coming in there.
Others with more experience
may think otherwise, but I would use lots of 'glass.