Why do we not sing the 3rd and 4th verses of the Star Spangled Banner?

Is it because hardly anyone (supposedly) even knows there is a 3rd and 4th verse? I watched a video of a guy singing it and it was 6 minutes for all four verses. So is it possible that it is just too long? I bet if someone like Christina Aguilera was singing it’d be around 8–9 minutes.
Here is a website that has all four verses on it.