Why we call Wheelchair as ‘Wheelchair’ ?

A vehicle is a mode of transportation that helps people move from one place to another. The list are Cycles, Car, Lorry, Bus, Train, Flight, etc. The vehicle could be manual-driven or automated. But they do have wheels attached to them which helps in their propelling.

Cycle or Bullock cart has big wheels which are manually driven, are we calling them as Wheel Cycle or Wheel Cart?
Buses, Cars, and Autorickshaw have wheels attached to them, do we calling them ‘Wheelbuses’, ‘Wheelcars’, or ‘Wheelautos’? The train has more wheels than other vehicles, but we don’t name them ‘Wheeltrains’.
Flight does have wheels, but we don’t call them ‘Wheelflight’.

Even trolleys, rolling shelves, and toys do have wheels; neither of them have prefix ‘wheels’.

Assisted devices were developed to help paralyzed people move from one place to another. With the help of those devices, people achieve their dreams and passions. The vehicles were manufactured like other vehicles with the person to sit and wheels attached to it. But the device was called a ‘Wheelchair’, person who uses the vehicle was known as wheelchair-bound person. Have we ever thought about this?