I assume your point is:
Bikes on path are unsolvable problem, because infrastructure is bad. There is no way to solve this problem, without adding more cycling infrastructure. Assholes are bad, and we should all hate them (but cyclists are not real assholes).
Now let me tell you my positions:
Several businesses and individuals already "disrupted" sidewalks for deliveries, and long distance commute. Breaking existing rules, and moving traffic from road to sidewalks!
Adding more cycling infrastructure just adds more cyclists to sidewalks (typical excuse is that cycling paths are not safe because of motorbikes). Just like with cars, more infra means more traffic!
Road are already congested, space I city is finite, so very often "more cycling infrastructure" means turning existing sidewalks into combined cycling/walking paths with zero change.
And this problem has really simple solution: just enforce existing rules! Force cyclists to step down from bicycle when on sidewalk. We have shitton of cameras and policemen!
If roads are too dangerous, let's add more protections for cyclists. Helmet, heavy motorbike jackets, perhaps airbags... All mandatory for speeds over 20 km per hour...