The root problem is so-called startup/growth hacker culture: you start from zero user. There are a lot of potential users out there. Far more than your current users. So, the best way to grow your business is not to retain your current users, but to grab new users.

In this scenario, you only need to cater to the most clueless users. There is no need to make an app learnable as you don't even intent to keep the users long enough for them to actually learn how your app works.