I would think it would be quite brave to try and bring down a giant sloth with spears!
It you want in dead right there right now, yes.
If you're willing to plant a spear in its belly and wait a few days for it to succumb to infection or blood loss while standing back watching and munching on smoked jerky from the last kill, perhaps not so dangerous...
... so long as you’re not the one on duty watching it from below.