Many people do. This is the trouble with common names. There are regional differences and it can get confusing. This is why scientific names are best to use. In this case, most people understand what a "sulcata" is, but "spur thigh" is often confused between greek tortoises, Testudo graeca, and sulcatas.Blakes exotic animal ranch repeatedly refers to the sulcata as an african spur thigh. Ive read about the african spurred tortoise but after watching the youtube video. Your subliminal cant help to get confused.
The info and tortoise care in youtube can be so misleading
Know what is even more confusing? "Greek" tortoises don't occur in Greece, but Marginated tortoises do. I think possibly hermanni as well...