I've seen wild ones on Corsica a couple of times and they didn't seem scared. One of them was in the road and I picked it up and moved it to a safe place and it did withdraw its head but it didn't panic. Both times it was special for me to see them. I don't think people on Corsica keep tortoises as pets. That would be a bit like me keeping a wild rabbit or something in the garden in a pen.
One of the times there were some kids kicking a ball about and they clearly thought I was a bit strange staring at the tortoise and getting excited. Crazy tourist!
If you are on the island you must visit this place - it's fab
https://www.visit-corsica.com/en/inf...m-and-aquarium