So can a regular bike. Human powered bikes regularly blow past me when I'm doing the 15mph speed limits on the bike paths.

That’s the same as a pushbike right?

So can a non-ebike. A couple of hundred pounds hitting you at 15-20mph is gonna suck no matter how it's powered.

Poor people commute on e-bikes. Think twice before making laws that raise the cost and give cops a reason to hassle people.