Yes, basically that's what I'm saying. Why do you think even major companies think twice before porting an application to MacOS? For many small companies who are already providing a Windows solution porting the product to MacOS is a pain in the ass that may turn out not be worth it. Only a relatively small fraction of proprietary end consumer software can long-term sustain a business anyway. That's as true for the app store on MacOS as it is for iOS and Google Play on Android.
I'm not saying that there aren't some companies who make money on the app store, of course, that would be nonsense.