Having been wheelchair bound for several years, and gimped up on a cane for several more, I can certainly understand the frustration... Even here, it is exceedingly difficult to maneuver.
That said, I am not advising retrofitting, which I think causes undue expense, but it costs little in new construction or in repair situations to install wheelchair access in curbs, navigable hallways, and accessible bathrooms... Even something like a wheelchair accessible teller in a bank is such a relief, that most folks don't really understand.
If it is relatively without cost, and simply a design feature, why not?