I have decided most hospital furniture for waiting rooms is designed to be as totally uncomfortable as possible. The only exception is the OB floor. Apparently, expectant parents and grandparents deserve extra comfort, while those sitting what amounts to a death watch in the ICU waiting rooms find that sitting on a cushion on the floor is preferable to any of the available furniture. Lord knows I've been there.
Most people don't want to spend any more time than necessary in a hospital, so it seems to me furniture could be more comfortable. As an odd contrast, the sofas and chairs in funeral home parlors are usually comfortable enough to sleep on. Go figure.