Horse ancestors originated in NA. But disappeared long before any Indians or other humans were here.
Yup. Just like all the marsupials in Australia have their origins here with the opossum.
That isn’t accurate at all depending on your view of man in north america. Plenty of evidence has man living up and down the western coast of north and south america.
Topper, pedra furada sites are 30k bce. Monte verde 15k bce. All within the range of ancient extant equines.