Imagine if each time you get the ball, you flip a coin.
On heads, you stand around for 5 minutes, then the other team gets possession.
That is what rolling 2 times and missing both times while staying still (because moving is clearly worse) is like in 5e D&D. You roll 2d20, both are low, nothing happens, next turn.
And I'm not granting that american football is a great game (or saying the opposite, as stating heresy is unwise), but even in a nothingburger play people got tired, hurt, learned stuff about their opponents, tactics where used and set expectations for the future, etc. There is at least some meat and potatoes there. And even failing that, stuff actually happened.
The only information produced in 5e D&D that is novel in the 2d20, both low, everything missed is at most a hint at the enemy AC. Nothing else happened. You can write a story about what didn't happen, but there aren't any mechanics attached to it.