The older I get, the faster I used to be ...
Hard to reply to you as we seem to be talking at cross purposes and about completely different circumstances. I do not commute. There is little or no cycling infrastructure in the area I ride. All of my riding is for fitness or leisure. I am not asking to ride at average speeds of over 16mph - most of my riding averages 10 -12mph. I agree that e-bikers, or any other bikers should not be blasting along busy shared use paths - but that's not the fault of the bike, it's the rider that's the problem. Assisted bike or otherwise,My experience is that the vast majority of bike traffic travels at less than (an average) of 25 kph (15 mph).
If you want me to agree to raising the limit then you'll need to convince me why it is a good idea to give Ebikers the ability to get assistance to exceed that average speed.
Again, I have no problem with you getting assistance to exceed 16 mph. I just think you should do it in different places to other bikers travelling at a normal speed.