Red sports cars always appear to be faster.
Leveraging market percecptions, the savy business perspective is to give customer what they think they need and demand; whether it is truely necessary or not is a correct but more nuanced question. And if it causes no harm, the only downside for those who are truely in the know is some additional cost at no real benifit.
Big diameter wheels, big diameter power transformers. Both are more market perception driven than engineering driven for a vast majority of products, and of course have real applications where they really do matter as well.