I think the point about stretcher entry on the S-92 isn't the size of the cabin - it is the size of the aperture (small door) which would mean an end-on entry rather than a side entry for the stretcher.
Could have been worse. The original S-92 design had to be lengthened to get that door width and could never have been a SAR tool if that original design had survived. It is worth remembering that a 1.4m cabin height is normal and that a tall helicopter you can stand up in is fine to fly around in but nobody wants to design them like that because at some stage you have to land the fkn thing!