This thread has me wondering . . . why has this topic become a debate?
There are lots of different critters, creatures, bugs and insects that live underground. They all dig a hole or tunnel, which creates a mound of dirt.
Just because you saw a mound which didn't have ants, doesn't mean that there are no ant mounds. Just because some sort of pocket gopher made some mounds doesn't mean that there are no mounds created by ants.
I've seen mounds, too, and walked up to them and seen the ants. Some were fire ants, and some were other species of ants I can't identify.
Fire ants live in our part of Florida and they are alive and well in The Villages. Be aware.
Here is a map showing where the red inported fire art (RIFA) lives in the US.