But then I'm a partisan of the Segway sort of chair with the wheels that can climb a stair ! Exoskeleton techniques are much better then the wheel chair... And when you take the amount of money spent in regulation, you could "give" one of those to each who needs one !
About 3 to 5 square meters are used in each new apartment built to follow regulations for the wheelchair that's a mean 8 000 for each flat! "What can I do, What can I write, Against the fall of Night". A.E. Housman
Apparently the city offered free use of the vaporetto (I think Line 1 at least is wheelchair-accessible) as a compromise, but was turned down. If the offer had included their use anywhere in the city, I think they were really foolish to turn it down; if the offer was just between Piazzale Roma and the train station, they were probably right, though it might have been worth trying to negotiate something more generous instead.