That's a simplistic view. I did almost exactly what you suggested and failed because although my co-founder was good at building lucrative relationships and even had some technical knowledge, he thought that he always knew best what should be done, wasn't really open for discussion, and generally was full of BS thinking he's likely the next Steve Jobs.
Unfortunately I recognized this way too late. Also, he never really proved he can in fact build something really valuable (but there were some smaller successes so I was hopeful).
Sounds like he wasn't very good at managing the relationship with you. Steve Jobs turned on the charm when he needed it - he was so good at reading people that he knew when he could treat them like crap and when he had to really suckup.
Sounds like you're partner didn't have anything like that. That's too bad because there's no relationship more important than the one with your co-founder.
Unfortunately I recognized this way too late. Also, he never really proved he can in fact build something really valuable (but there were some smaller successes so I was hopeful).