You as the founder should then coordinate the efforts of your different experts and handle all that other startup stuff (talking to investors, aquiring customers, etc)...
Venture capitalists for example are notorious for investing in startups and replacing the founder and/or CEO with "more experienced management" as the company grows.
A well known prominent example is the ouster of Steve Jobs at Apple in the 1980s by John Sculley whom Jobs had supposedly hired -- with the support of the lead investors such as "Mike" Markkula and Arthur Rock.
Steve Jobs is not an unusual case. The founders of Cisco Sandy Lerner and Len Bosack were ousted by Don Valentine/Sequoia:
http://www.businessinsider.com/how-ciscos-founders-were-oust...
There are many other examples.
https://www.cnbc.com/2017/06/22/ousted-founders-ubers-travis...
Briefly:
Steve Jobs, Apple Travis Kalanick, Uber Jack Dorsey, Twitter Parker Conrad, Zenefits Andrew Mason, GroupOn Jerry Yang, Yahoo
This is just a small number of particularly high-profile cases.
https://work.qz.com/1125919/we-finally-have-proof-that-visio...
This is the direct link to the research mentioned in the article:
http://www.people.hbs.edu/rsadun/AreFounderCEOsGoodManagers....