For this purpose, as implemented in the Facetmobile, the advantages over a more conventional (higher AR) design would be:So, the only major advantage I see is perhaps ability to crash in a narrow zone.
1) A relatively large wing area with low structural empty weight. This allows for a low stall speed (despite the lack of high lift devices and possibly a lower Clmaxl).
2) A large passenger area volume for the weight. This allows for extensive crush area without impingement of the occupied cabin area.
But, yes, a plane with a higher AR can have a stall speed just as low as a low AR plane, and will likely have a higher glide ratio (which has its own safety value).