My original comment is based on pure fact. No emotional content or opinion was included.
A Motorbike is a vehicle consisting of two wheels held in a frame one behind another with a motor to propel it.
A bicycle is a vehicle consisting of two wheels held in a frame one behind another, propelled by pedals.
How the motor creates the power to propel the motorbike is unimportant. How that power is or is not blended with any additional power source (such as human effort via pedals etc…) is similarly unimportant.
I have no axe-to-grind one way or another and I want everyone to be able to access any outdoor recreation that they want. I hope that clarifies my original comment!