the wolf is a noble animal. It knows how to work with other pack members and is resilient as youve already mentioned. Sometimes they even take care of sick members. Even big cats dont usually behave like them. It was only natural that humans would domesticate them.
what do you think of the dingo? Dingos mix freely with dogs in australia they are originally descended from asian type primitive dogs but now are very mixed. They are basically no different than domestic dogs except they are more feral and have larger teeth maybe also a stronger bite(??).