For facial recognition I believe it's possible to use pre-trained networks and add extra layers for specific (visual) demographics. You're correct that for the

For facial recognition I believe it's possible to use pre-trained networks and add extra layers for specific (visual) demographics. You're correct that for the engineering of soap dispensers an actually different method might be preferable. That however boosts a previous point; if the engineers behind the soap dispenser had a number of black members, would they have designed something that didn't work for them, or discarded it in the design stage?