It's not the same at all, because trying Walmart again later in the day means literally driving back to the physical store. With Amazon, it means getting your phone back out.
I'm sure there is some impact, but it's nowhere near the inconvenience of being locked out of a physical store.
If you already waited overnight, then 2 hours isn't going to cause you to go home and come back. You're going to continue to wait in the line until the store opens back up.
I'm sure there is some impact, but it's nowhere near the inconvenience of being locked out of a physical store.