1. I cannot bring the bike in to many places such as the office or the gym, it must be parked outside exposed to the elements. On the other hand, scooter, wheel, and longboard can all easily be picked up and carried indoors basically everywhere, including public transit, shops, gym, and office.
2. The bike requires physical effort, which is great if you're biking for fitness, but when I'm commuting somewhere I don't like to have to shower as soon as I get there.
3. Onewheels and skateboards in particular are so much more fun to ride than bikes on regular roads. (Bikes are still way superior on trails and mountains though).