Competed in 27 shootouts, won 20
They’ve won 7 cup finals on pens, lost one.
Safe to say percentage wise that is an incredible stat compared to anyone.
Not certain of ours*, but we lost in the Europa League final, and the Arsenal FA cup final. We’ve never won a penalty shootout in the entire 151 year history of the FA Cup.
*just checked, 18 shootouts, won 8.
Penalties are almost pure luck. Skill and mental fortitude has a
tiny impact, but it's so small that it almost never determines the outcome of a shootout. To illustrate it, here are the actual statistics when I looked them up last year:
On average, forwards score 75.99% of their penalties.
Defenders score 73.42% of theirs.
Goalkeepers score 71.85% of theirs.
A player who takes >75% of his team's penalties scores an average of 77.33%.
A player who takes <25% of his team's penalties scores 75.34%.
This illustrates how little it matters. There's a few percent's difference between forwards and goalkeepers who virtually never take penalties at all. Skill and experience is nearly irrelevant, it's basically a coin-flip.
Ronaldo, who is known specifically for it, scores 83% of his penalties. It's less than 10% more often than the global average for forwards. The best penalty-taker in the history of football scores slightly more often than random idiots who only have to do it a few times in their entire careers. It's
almost entirely luck, with a tiny margin for skill and experience. For reference, Messi's penalty record is 77%. Messi is 2% above average.
Goalkeepers generally just guess. They save roughly 25% of penalties. If you pick a random side and save half the shots that happen to go to that side, what do ya know, that's a 25% chance to save any given penalty. Goalkeepers who are said to be particularly good at penalties have the same tiny, insignificant edge as illustrated with penalty-takers.
When a team has won the vast majority of their penalty shootouts, it's just raw luck on their part. There is no such thing as being outstanding on penalties. The very best are
sliiiightly better than the rest. Statistically speaking, this will very rarely change the outcome of a shootout.
It's like flipping a coin ten times and then, if you're particularly "skilled" at it (if we pretend that's possible), getting to choose the outcome on the tenth flip. Now have a coin-flipping contest with someone ten times. How many times would your 1/10 advantage actually result in you winning the contest? Randomness completely dwarfs it. It might get you one win in those ten contests.
In other words, the fact that Liverpool have won seven of their last eight cup final penalty shootouts is demonstrably a case of absurd, wildly improbable luck. It is demonstrably the case that you cannot be so "good" at penalties that skill and merit would result in such a win rate. It's 95% pure luck, and Liverpool have it in silly amounts.