No idea why people do not follow standard traffic conventions for right of way with a shopping cart (or while walking in general)

It's honestly mindboggling.

You're moving a four-wheeled vehicle down an aisle, with enough room for 2, maybe 2.5 cart widths. Yet people decide to stop right in the center without considering that they might be blocking someone.

But I'm the jerk if I point it out.

People are so silly (myself included)