OTOH, motion sickness is often called "car sickness" for a reason, people who suffer from it only sometimes suffer on a bus, and rarely if ever on a train or a plane, so I'm not sure I would agree that "all transportation and tourism related businesses" are impacted. Also, doesn't dimenhydrinate work for your wife or kids?

Dimenhydrinate has undesirable side effects. My wife cannot ride buses and gets sick on planes too. It restricts our travel quite a bit.