So calm your tits.
Your comment is irrelevant otherwise because last time I checked cars are the real problem, and concerns over e bikes / delivery bots is just another lame extension of “safetyism” and ignorance around public transport failures that just misses the mark.
“Riding in traffic” is half the issue here. Like trying to explain water to fish.
A friend of mine spent a week in the hospital recently after crashing his new e-bike almost immediately after buying it. One interpretation of his accident is that he didn't have some of the right instincts for riding a bicycle at that speed.
I don't actually have a clear sense of the breakdown of risk attributable to the different factors of lack of appropriate cycling infrastructure, lack of appropriate rider training or experience, lack of appropriate rider expectations, or inherent safety or stability problems of some designs. My friend whom I mentioned above said his doctors told him that they had been seeing a lot of patients who'd crashed e-bikes (as well as electric mopeds and electric skateboards) at speeds that produced fairly serious injuries.
So your problem is (electric) motorcycles that are (legally?) accessible without a motorcycle license and motorcycle equipement. For safety what matters is the speed and the weight of the vehicle, the faster and heavier, the more dangerous.
I am also noting that unlike with SUV accidents, your friend put a lot less people in danger if not only himself.
Something I think a lot about when it comes to e-bikes, is the level of protective gear people feel they ought to wear on "a bike". Not all cyclists even wear helmets (obviously bad), but in addition to a helmet, on an e-bike you really ought to be wearing elbow and knee protection, purely because of the speed involved.
However, my sense is that people (a) don't think about that at all because they think of it as just like a bicycle, or (b) don't want travel with all of that extra gear. They want to treat an e-bike like a bicycle, when it is something much more.
I say all of this as a cyclist (non-e-bike) and rollerblader. On my bicycle I will just wear a helmet, but because of the particulars of rollerblading, I always wear elbow-pads and knee-pads. Differing circumstances require different adaptations.
Indeed, if it's going above 50 km/h, it's not a bike it's a motorbike. Protective gear should match the speed and weight of your vehicle. To drive a motorbike, you should have motorbike license and equipment. It feels like a regulatory issue frankly.
Big trucks and SUVs are a much bigger problem. But that doesn't mean kids riding around on motorcycles isn't a problem either.
For heart issues, it is a bit hard to fix. You need a healthy lifestyle is general is something you need the correct environment for and a good education about. Still, it's not impossible and any sane country has food labeling requirements and education around it as well as promotion of physical exercise. It's being done.
Similarly car-centric city design is not easy at first but it can be done and has been done:
Relax zoning and parking requirements, provide good fast collective transport alternatives,that is with dedicated lanes and safety staff. The general idea is that you shouldn't be forced to have a car if you don't want one. Even people who do want to keep their cars will be happier because there will be less people on the road overall: Imagine that traffic jam you're stuck into if half the people vanish because they are using a bike or a subway, woosh, no more traffic jam.
https://www.youtube.com/watch?v=vEpjPRs4Iio
Also, the woman with the roller bag.
If that is truly what McNamara meant, it is very sloppy that they failed to say so.
EDIT: For anyone downvoting me, I am respecting the text of the article, because that is what most people will read. Most people will not see olyjohn's caveats and context (which again, I agree represent the real problem).