I don’t know if you have seen the trash heap of bad apps that is on the App Store. It gives the distinction impression that Apple does not reject bad apps, only apps they don’t like for arbitrary reasons.
I do agree that the best solution would be allowing third party stores.
Just because bad apps may make it onto the app store doesn’t mean Apple’s implementation is failing. Security holes are not discovered in a vacuum. It’s like playing wack a mole. For obvious points just like at how Epic got banned from the App Store. They snuck in a direct payment option and got approved for release, only later did Apple find out. It’s possible that those bad apps snuck in malicious codes and the app reviewer missed it. It happens. However without Apples review and ability to act as goal keeper there would be much more of those kind of apps,.
I’m not sure how third party stores are the best solution to this. That means users would have to trust another gate keeper for security and validation. 3rd party app stores will just increase the possible of malicious apps
I do agree that the best solution would be allowing third party stores.