Routinely. The only weather I have encountered that is really problematic is when it's very windy.
I would also note that the conditions you list are also the conditions under which you shouldn't even be driving.
> Have you ever lived in places that are not perfectly flat? or lived in places that are hot that make bicycling unfeasible?
I live in a very hilly area. I don't know how hot you consider "unfeasible", but we top 100 degrees pretty much every summer.
> Did you have sporting gear / work gear that you had to lug? Did you know some people have to fetch their own gear to work
Yes, I do all of that. An urban bike trailer (easily folds up to briefcase size when needed) solves those problems.
> Have you had to shop for more than a baguette or a bagel at a store? You know how cumbersome that gets for even a family of three?
Again, trailer.
> Do you have the slightest clue how much casual violence and crime happen on public transit?[1]
That's extremely dependent on where you live. Where I live, there is nearly no such problem.
Ride-sharing, autonomous vehicles and emission-free vehicles should all alleviate the issues we currently face with traffic, parking and accidents.
However doing away with cars or vehicular traffic is just pollyannaish madness.
[1]
Teen robbed at gunpoint at Fruitvale, BART officer says writing a report is a 'waste of resources'
https://www.sfgate.com/local/article/bart-police-refuse-repo...