e-bikes are not a panacea
But the biggest flaws with e-bikes are physical and psychological. The bicycle is meant to be an endorphin-multiplier. In my mind, bike commuting's big draw is burning calories on the way to your destination. Yes, an e-bike is better for the environment than your car, but in the end, you forgo a crucial part of the experience. You make yourself better, and stronger, when you ride a real bike.
By doing the hard work for you, e-bikes cheat people out of that accomplishment and ultimately make them lazier. They enable entitlement to motion and a sense of false accomplishment.