Aye, for normal clubs with a squad it might be a myth.
But for teams like us who've just fielded Hayden and Longstaff in the middle against Chelsea, we can't afford to risk losing anyone. I know we done ok against Chelsea, but I'm pretty sure that would be the exception, not the rule
Having said that, personally, I don't think I give a fuck whether we go down or have a cup run when the end game is ultimately losing Rafa and us limping along forever more. Just such a pointless club to follow.