Not a single non tech person I know has ever complained about the size of an app on download. Not one. They don't even look at the size its not relevant to them. They want to do something that some app enables. Besides how well it lets them do it no one cares about the size until they are out of space, which is usually because they have so many videos and photos stored.

You're kidding yourself if you think the average person looks at the size of an app.

The only case I can think of is mobile apps on slow connections. Even on a fast connection waiting a minute to download an app seems a bit annoying.

I don't see much evidence that they care until it notably impacts their free disk space, which at current storage sizes is when you reach about 1GB (or even much later, depending on your target demographic)