Value isn't a simple equation - it's often multiplicative.
A co-founder with distribution options allows you to hit the market multiple times (sometimes this is true for investment), greatly increasing the chances of something catching on. Often times, they can save you going the wrong path with the product too.
A co-founder with technical skills can make the first version faster and strategize product work later as compared to other options. Except in the case where you are doing Truly Innovative Technical Work in which case you probably want a pro-team of mostly or all technical leaders with perhaps a CEO-style visionary for PR and some strategy, that however is not a startup so much as a moonshot, a business which operates differently.
These two skills are much more multiplicative than additive for most startups.
Technical people also get unique benefits: they can also opt away from dealing with some stress, people problems, etc - it's a deal a bit like insurance in that sense. And the risk staked by the business size is larger: a technical person whos product does even slightly well can get hired into a management role at another tech startup working on R&D. This is rarely true for CEOs unless they make it big. So the failure/"just about ok" stage that 70% of ideas leave at, is much better a position for CTOs than CEOs.
In your position I would try to launch several projects alone as a technical founder - the value of distribution will be made clear, making you value your co-founder more, or you will succeed - either result is good for you.