> He liked horses and chariots and there are descriptions of him hunting and even fighting wars on them. > >

So this is not actually much evidence. Ancient egyptains did a lot of propaganda and we have depections of pharaohs who never even went to war smiting their enemies. Then there was Ramses going through a full propaganda complain where he replaced the names off the works of older pharaohs and said they were his own and where he lied about the outcome of the Battle of Kadesh.

There's a lot of propaganda in ancient eygpt and King Tut would have been depicted hunting and riding chariots regardless of whether he was disabled or not because that was what was expected of a pharaoh. They were all depicted as youthful and invigorated and as warriors.

The egyptains would also pretty much erase from history any humiliating defeats or anything they didn't like.