The difference is that he decided to do something and did it.He did't invent a car but he welded a dubba and put a purchased engine build by someone else.
I need less than one month to build a car with provided engine despite even I am not a welder.
He started something and finished it.
It's not the actual car that is to be admired but the spirit of the man.
His two sons helped him. Just think of the lesson they will have learned from their father.
I think you are being unkind.