My house is meant to be disabled access. I can't even get a Mac Major over the threshold without hurting myself, fuck knows how the last resident got the power hair over the wooden bit at the bottom of the doorway. My wet room is lovely...except it's NOT. I'm luckily not in a wheelchair YET (will be in the future, riddled with arthritis and am only 32, have the wet room due to epilepsy), but the doorway isn't wide enough to get a wheelchair through. 
Plus there's the small fact that the shower itself has been broken since I moved in almost 8 months ago, and the HA's repair contractors don't seem able to organise a puss up in a brewery, let alone find the special part that they ordered 5 months ago that's SOMEWHERE in their warehouse...
Can't get a DFG here because I already have the wet room (despite the fact that it's not useable as a wet room).
I couldn't get a DFG in my last place either because they knew I'd have to move as the house was too small. Went 9 years there without a wet room too...despite having a room large enough, with the correct gradient to where the drain would be sited, just with no actual shower, with a large enough door to get a chair through.
No common sense at all.