"Small" is probably the wrong word in my mind. "Compact and accessible" is more accurate. I know exactly where everything is in my kitchen, of course; but when I'm cooking, everything is on the kitchen top (or cooker) ready to be used. Mise en place doesn't just include the ingredients.
Knives on a magnet band, no way. Too risky, not just for kids, evidently, but also for adults. Knives, especially razor sharp knives, should be kept well out of sight.
Clutter is not something I like - my kitchen has everything inside drawers, cupboards, etc. The only things on the counter are the microwave and the toaster; everything else is out of sight. His kitchen would make me claustrophobic.
Single sink? Nope - I prefer my double sink.
Doesn't like people in the kitchen watching him?? Come on, one of the great things about cooking is sharing with others. It's not a sanctuary, it's a place for enjoying food, which everyone is going to share. If he thinks cooking is for Carmelite monks then he's way off the register. Friends who come into my kitchen come to learn, to share and to criticise - objectively, of course.
Obviously, you want a well-designed kitchen: cooker next to the counter next to the sink next to the fridge.
I think the man needs to cook a BBQ for 30 people right now, see if he manages or not.