I can not speak for other Scooter style rides, but I can tell you from my own personal use.....I ride 95/5 battery. For 2 reasons
1) I have bad knees, and the last time I rode MTB style, my left knee gave out on me. That left me stuck on the side of the road unable to peddle or walk my bike to where I was going. Thank goodness I had a cell phone and a friend with a pick up.

2) I have a short ride to work and the scooter zips me there nice and quick, no gas used and I don't have to stand and wait for a city bus.

Now of the times I have used the peddles it was because I gave the bike hard rides and had to assist the motor climb hills ( low battery charge from long rides ).

You can peddle most of the scooter style, provided they have a firm fit peddle. Most attach to drive like a socket wrench. As i test drove a few models before I bought mine I noticed some have far to much wobblw in the peddle. Mine has a slight wobble when you turn the peddles with your feet, but it's more a strain on your groin because your feet are in a wide stance.

I know I could peddle my scooter from home to work, however I fear a knee giving away on me thus costing me time off so I don't. Now granted the speed loss is also something to think about......you will not set any land speed record doing so.