The practice you skipped is going to show up at the game and play for the other team.

Preparation is stored as speed on a specific movement you no longer have to think about. A missed session does not leave a blank. It leaves a hesitation, and hesitation in a live moment looks exactly like a mistake. Nobody watching will know where it came from, and neither will you.

If you have to miss something, replace it rather than delete it, even a short version at home. Half a session keeps the movement warm. On the days you could go and do not want to, go and do less.