If penalties were truly random then teams wouldn't practice them. Goalkeepers wouldn't study their opponents' past penalties or use cheatsheets when facing kick

If penalties were truly random then teams wouldn't practice them. Goalkeepers wouldn't study their opponents' past penalties or use cheatsheets when facing kicks. There wouldn't be so much analysis and game theory poured into the perfect sequencing of kick-takers. It's true that penalties test fewer skills than a full-fledged game of football. But they are still a contest of skill, not a game of chance.