While I have a tendency to agree with your generalized statement that bumper mounted hilift can be dangerous. I’ve seen shoddy hardware used before. These mounts do not look to be halfassed. I suspect the welds on the light tabs on the bumper would fail before the bolts.
Also, physics would...
Taking just a carcass will help keep your gvm down too. A nice tire repair kit, a tube and a bottle of balance beads is lighter then a whole functioning spare. That said I’d look at the status quo for spare tires in the location you’re going to.