You seem to be doing a little re-writing of history yourself right here:
> Instead Jobs decided business wise he could lock devs into developing native apps in the iOS ecosystem, scapegoat performance and security for the ban, and gain a competitive advantage at the same time
Steve Jobs never even envisioned the App Store model when he decided against supporting Flash in Safari.
From https://en.wikipedia.org/wiki/App_Store_(iOS) :
>... prior to its unveiling in 2007, Apple's then-CEO Steve Jobs did not intend to let third-party developers build native apps for iOS, instead directing them to make web applications for the Safari web browser. However, backlash from developers prompted the company to reconsider, with Jobs announcing in October 2007 that Apple would have a software development kit available for developers by February 2008
You can also read about an actual iPhone engineer's thoughts on the matter https://finance.yahoo.com/news/apple-engineer-reveals-real-r...
Interesting tidbit: Apple was actually trying to work with Adobe to iron out Flash's security problems but was rebuffed.
Anyways, the fact is, the App Store was actually an afterthought.... An accident of history that even Steve didn't see coming. The decision to forego Flash came way before that.