Besides the fact that the hunting hypothesis is that; a hypothesis, there’s a lot of other factors as to why it isn’t a good idea. Mainly, ohh idk… The fact that they have had no place in nature in over tens of thousands of years? Even if we managed to create an artificial habitat and role in an ecosystem for them, they would be very vulnerable due to megafauna’s increased minimum land requirements because of their size and in danger constantly due to climate change.