How is an app store for web apps a "plague"? The Chrome store is another choice, not the defacto (like the Apple store). In my eye as a small time developer it

How is an app store for web apps a "plague"? The Chrome store is another choice, not the defacto (like the Apple store). In my eye as a small time developer it gives me another avenue to get noticed, I don't see how it harms me.