Exactly. Its easy to improve on something when someone else already did the work, he just took the risk of making his face synonomous with the brand. I dunno, I dont get why people are going to apple stores and lighting candles and that he "changed the world". Cmon. 
Actually I think it is a very good comparison. If you know the REAL Edison.
Edison, in his early years actually did invent a few things, a few things that were fairly impressive. As soon as he started to turn a profit from it though, things changed. Edison "invented" products that flat out didn't work. The lightbulb is one of these inventions. Sure an electric light is a great idea, so long as it burns for more than 10 minutes.

Edison hired hundreds of inventors and engineers for his lab and once he "invented" a non-working prototype he threw it at them, the real talent, and they worked on it until it was actually functional. Of course once it was, he got all the credit and royalities, because he was an ass.
Once in a while he hired someone with real talent, like Tesla, and they quickly butted heads.
Years later Tesla invented alternating current, the only practical way to power as large a nation as the US, Edison was furious as it would cut into his lucrative DC power contracts with New York. Edison started a (almost completely false) smear campaign on Telsa and AC the likes of which had never been seen. He even went as far as electrocuting elephants with AC to show how "dangerous" it was.
So yeah, replace "Edison" with "Jobs" replace "Tesla" with "Gates" or "Waz" and picture the smear campaign as those damn mac commercials and you've pretty much told the apple history.
I'm just saying... many "great men who changed the world" aren't all that great, it isn't just Jobs.
