Well, yes you can walk that distance, which is good as a B plan. And I'm sure somewhere there's a walker's forum where most folks will prefer hoofing it to a bike ride. And there are I'm sure a lot of skiers would prefer to ski it. I understand there are some places where riding tauntauns is the way to go (and tauntauns have that wonderful B plan). But bike riders might choose biking because they want to, because it's more fun for them (and because it's faster than walking).
My experience is that yes, there a days that are less fun, but even in a MN winter climate, there a lots of great days too.