As is usual with these sorts of mainstream articles, it's kind of fear-up-y. Even so, worth the read.
About all the content I can add is that brain damage to an unprotected skull starts a little below 15 mph, and your brain doesn't care if that's your 15 mph, the car's 15 mph, or 15 mph from your 7 foot fall. A helmet more or less doubles your head's crashworthiness, but don't count on too much even there because things like neckbones can start breaking too. (And then it's hello motorized wheelchair for your new e-mobility.) See previous discussion of bike helmets.
E-bikes have their place off-road, as I've discussed previously (tldr: for a few medical reasons, or for very specific race training purposes). What's more, they have a place on-road as cargo bikes (example 1, example 2). Commuting? Nah, can't really see the need. If you can't do the distance, you likely don't have the skill set to navigate the traffic. Get a bike and build both endurance and skill, together, and then start bike commuting.
Look man, these things are motorcycles. What kind of moron turns a tweenager loose to ride a motorcycle in traffic?