It's indeed somewhat close to the vehicular cycling argument, but far from identical. I see a lot of cycling infrastructure that follows the philosophy of "bett

It's indeed somewhat close to the vehicular cycling argument, but far from identical. I see a lot of cycling infrastructure that follows the philosophy of "better force them to dismount, someone might hurt themselves here" and it's really not caring of cyclists but disrespectful towards them. I fear that overuse of childproof-argument will only strengthen that mindset. "Really, you have to take that nice, scenic, ten minutes detour because I would not let my child ride the direct route. If you're in a hurry, take a car". This is not how you make people switch to bikes, this is how you teach them that bikes are merely toys for a nice Sunday afternoon ride. I'm fine with designing for humans, but not all infrastructure has to be child proof, as the interstate network clearly shows. We have the technology to create motor vehicle infrastructure ready for unattended children (bumper car floors, yay!), but for various reasons we chose to take very different tradeoffs. Two tier infrastructure can by the way also mean that children up to a certain age legally share the sidewalk, which is a much better place than sharing even the most segregated bike lanes with texting pedelec pilots.