”Most people make the mistake of thinking design is what it looks like. People think it's this veneer — that the designers are handed this box and told, 'Make it look good!' That's not what we think design is. It's not just what it looks like and feels like. Design is how it works.”
Citing the mouse thing is a prime example of this silliness. First, it ignores that it doesn't matter whether the charging port is on the bottom, because that mouse cannot operate when it's plugged in. Second, it ignores that you can charge the thing in a few minutes, so, again, it doesn't matter that the port is on the bottom.
Only people who don't actually use an Apple Mouse think that this matters.