The 30% fee is factored into all the prices you're looking at.
Your argument that apple created and maintains the user base would be a lot stronger if google and all of the other phone makers were not quietly waiting to snatch up any customers that got sick of apple.
> The 30% fee is non-negotiable which guarantees a certain level of price gouging.
Well, if you don't want to pay that to get access to the user base that Apple created and maintains then don't pay it and don't have your app on the App Store. This is pretty easy. Heck, companies get around this all the time (Spotify for example).