A couple of years ago I went on a guided bike tour in France. It was a boat and bike cruise and they provided upright pedal bikes. The guide said that when they offered the option of electric bikes, more people crashed. It may have been because inexperienced cyclists were more likely to request the e-bikes and would have been just as prone to crashing on regular bikes, or it could be that the riders weren't used to the extra power and crashed due to going faster than they would have on a non-powered bike.