Don Pacifico i quite literally said the opposite. I said that whatever stats you've seen has never told you that Leno is a better GK than Ederson, just that he's a better shot-stopper.
That people choose to take those stats to mean Leno is the best GK in the league is their problem, not the stats. So in your example, Ederson's passing clearly hasn't been included in the stats shown since you thought they made it seem like Leno has better. So the question is - what stats do you think are missing that Ramsdale does better than Raya in?
If one GK is better at one thing and the other is better at other things, they of course stats can't tell you woh is the best GK overall because that depends on what you want. However, if one is better at everything, it's weird for me to think that wouldn't tell you who's the best.
If you're saying that stats can't show which GK is better at making saves than another, then I very much disagree with you.