I think the point is that sure, some people are jackasses. But take 1000 people and give them carbon road bikes and turn them loose on the local MUP, while you'll have some problems, its somewhat mitigated by the fact that even with a fancy road bike it takes a great deal of training and riding to be able to sustain higher speeds and be that sort of problem and very few will attain that. On the other hand, take 1000 people and give them 3000w ebikes and turn them loose on the local MUP, you'll have a much greater number of problems (probably an order of magnitude more) because anyone who is so inclined to jackassery will be able to indulge themselves right off the bat.
Sure, you can argue the person is the problem, but when it comes to public infrastructure we do have to design to the fact that people are selfish and impatient do stupid things. Its why we have speed limits and stop signs and all the other legal items (and enforcement agencies empowered to enforce said legalities) to try and keep some semblance of order on public roads. Its also why we try and define ebikes as something other than motorcycles. Saying the rules are dumb, we can ignore power/speed limits on bikes and just trust people to just ride acceptably is... very optimistic about human nature.