It’s the same reason I preferred the 170km long Hwy 97 drive from Kelowna to Kamloops at 90-100 km/h speed limits rather than the 207km long 97C (Okanagan Connector) and 5 (Coq) at 110-120 km/h speed limits. Get there in about the same amount of time, it’s much more enjoyable, and uses less gas. There are some passing opportunities (third lanes, broken yellows) on the windy road but not too many. If you pass one semi, you’ll catch another anyway but most of them are doing the speed limit. It’s always those motorhomes and Canadreams slowing things down.