I have kickstands on some one of my bikes, two I don't. I'm not a purist about it, but found almost invariably there is somewhere to lean the bike or I'm locking it up at bike rack - so never bothered on the last 2 bikes.

If not, there is usually a curb in a parking lot that you can lean your pedal on and the bike stands up just fine. If there is no curb, you can put your helmet down and make it act as a curb.