Towing capacity isn't same as being able to pull heavy things. Pulling has to be matched with the corresponding braking power, which with regenerative braking means a massively over-spec regenerative system. Or you give up on regenerative braking and just install bigger disks, hammering range. That tesla can move an airbus along a runway (so can any honda civic btw) but try moving that aircraft down a hill at speed ... heading towards a sharp turn ... beside a cliff .. over a river... and maybe there is some ice.