I think his point is that Apple's app store is commonly criticized for being a walked garden. While the Android app store may be as well, some complaints seem specific to the Apple side. For instance, releasing a new or updated app requires manual review from someone at Apple. I've only seen complaints about an app release taking an arbitrary amount of time with the Apple app store.

There's a list of guidelines your app must conform to, and Apple is generally more aggressive about catching violations before app release compared to Google. There are consequences to this, like Safari-WebKit being the only permitted browser engine on iOS. Any other browser must wrap this engine.

The grandparent post is likely pointing out the dissatisfaction that devs express regarding the Apple app store review process. It seems like it comes down to an engineering trade-off. At some point you have to choose between developer experience and end user security.