Yes, but the slightest amount of wind will make it fall and this is certainly not unique to my bicycle. It is better to leave a bike in a more stable position.
Putting a bike standing against a car doesn't damage it. Typically the only parts that touch the vehicle are saddle (soft material) and handlebar bar tape or grip (again, soft material).
The kickstand is an integrated part on most bicycles, and yes they are often undersized. However, like I said, people think it is normal to park their bicycles against mine, so why should it be different with other vehicles like cars?
Do you think people should treat cars and bikes 100% equivalently (including such things as whether you can drive them in the bike lane), or would you agree society should treat the two differently?