Defining a vehicle is becoming more blurred. Those who would like to characterise a bicycle as not being a vehicle - what happens to the classification of the growing number of e-bikes? They could/should be called a motor vehicle? Same for electric scooters.
I think all wheeled road users should be subject to exactly the same laws, limits, restrictions and penalties for infringement. I cannot see a reasonable argument for any difference. Granted, perhaps not the most urgent legislation ever promulgated. And many proposed laws never get to statute - time and effort vs importance means many run into the sand at parliament.