On one hand, it has made design a lot more accessible as it doesn’t require intrinsic knowledge of texture and lighting to create a stunning and platform-acceptable icon. On the other hand, it has also opened up the floodgates of mediocre icon design. Where everybody with a copy of photoshop and 10 minutes to spare can create something that could pass as an app icon.
Let’s talk about white app icons
Michael Flarup

I don’t get it: if it could pass as a platform-acceptable app icon, what does “mediocre icon design” even matter?

What’s the downside of the “mediocrity” you’re referring to? Is it simply pixellated under a microscope, or is it an altogether ugly logo?

In other words, if a startup’s minimally viable app icon is pixellated, who cares!? If it’s an ugly logo that users will associate with the startup’s brand, then that’s a bigger deal.

A minimally viable app icon is just that: minimally viable. If a startup doesn’t have the chops to design a minimally viable icon (i.e. the ugly logo), then the output is not minimally viable: it’s sub-minimally viable, and they should hire a designer.