What you want to bet, when it comes to "who" buys those super singles in the trucking industry, it wont be the drivers & probably not anyone in the trucking office that ever drove a truck for any length of time.
A bandaid is good if you got a cut or scrape on your body, but you dont need them if you have no cuts or scrapes, so you just dont need them.
Same goes for the duel tires, why mess up a proven thing & then have problems later with just using one.
Neil