I don't care what people ride. If they want an ebike then that's great. More people on bikes is better for everyone-- less cars on road, more cyclist awareness, better walkable/biking infrastructure, etc.
But it is very misleading to say ebikes get more exercise. Where is the data? How are they quantifying exercise? Watts are watts, so you'll need to work the same for those watts regardless of the type of bike you're on. Your 'Time in The Saddle' may be higher with an ebike if the less work makes it more appealing to you, but you're only getting more exercise if you put out more watts than you would have on a traditional bike.
Separately, if someone is really motivated to exercise more, the type of bike is not the factor. It is their time. Ride any bike you want but at some point you'll need less endurance rides and more intensity. The best way for intensity is doing it all yourself. Ebike might help with the recovery intervals but it isn't going to be the main consideration in your workout.