I rarely go around cars and I usually just wait for them to park. It's just that some people go around these waiting cars but then there's another car coming in the other direction and then there's that awkward situation where cars are stuck and can't drive anywhere. Then add in people walking and pushing carts then cars backing out, it almost always holds up parking lot. Yeah, our Costco's parking lot is pretty horrible. There's only one way in and two ways out. I think it's the design of it that makes it bad.
If I do it, I make sure that I can safely and quickly pass the waiting car.