The inconvenience and danger caused by cars is so much more. You have to be on alert to avoid being killed by them. Huge swaths of valuable city real estate are devoted to free or low priced subsidized storage of cars for entitled car owners. It's astounding that this has gone on for so long and it needs to be stopped.
When bikes are ridden on the pavement, it's usually because road design and/or car drivers are making the road too dangerous for them. If you think about it, the pavement is not somewhere the average cyclist wants to be any more than a pedestrian wants them there. Even without people filling them, pavements are irregular, uneven and cluttered spaces, optimised for slow-moving bipeds who can stop, start and turn on a dime. If there's a safe roadway available, cyclists will use it.
If my bike can't use the road, I dismount and walk it. Riding on the sidewalk is illegal. I don't begrudge anyone who does it perforce - say, if there are no alternative roads and they need to get to work - but I do begrudge cyclists who seem to forget that dismounting is even possible.
