Hmm, I don't think people using bikes are too lazy to walk. Then you'd use an electric bike. People using a bike are too busy to have time for walking. Using a bike is just as much effort, just condensed over a shorter period of time.

Biking a given distance is significantly more energy efficient than walking thanks to the wheels maintaining your momentum and decreasing friction.

https://en.wikipedia.org/wiki/Energy_efficiency_in_transport

More energy efficient just means you can expend the same energy and go faster :D

To be fair: I simply cannot ride a bike in my area - I moved to a mountainous area about 10 years ago. I'm fine on flat stretches, obviously OK downhill, but uphill is a struggle. A half a mile uphill is no joke. I walk because I can't realistically ride a bike. An e-bike would allow for slightly faster transportation and the ability to go up somewhat steep inclines. Since the ones around here are all electric-assisted (you still have to pedal), it means that I'd at least get some movement out of it.