At first I thought the joke was he got a minor scratch and it was merely another reference to him eventually losing his eye. However I was like wait...WTF??? this is the actual reason they're going with for how badass Nick Fury loses his freakin' eye??? It 100% undercuts his delivery to Pierce (Redford) about how the last time he trusted someone, he lost an eye!
Cause now it just makes Fury look like he's embellishing a dumb story...ohhh yeah, I trusted this cute kitty cat alien and I lost my eye...poor me! Oh, no...I didn't lose it to a fellow agent/spy that I entrusted my life with who turned out to be a traitor/double-crossing agent who tried to kill me, but didn't, but was very close...except I was able to escape...just barely! But I lost my eye in a dangerous shootout in the process. NOPE! Instead it was an alien cat! And because of
THAT, now I trust no one!!!....I'm sorry, but that's
DUMBBBBB and poor writing.
There were so many cool and interesting ways to make his eye loss an epic backstory, but instead...CAT...yup...it's canon and it's official now.
And since the Russo's were in charge of, arguably MCU's best movie TWS, I'm sure for them to see that this mysterious, intriguing setup turned into a letdown joke would rub them the wrong way. Cause it certainly rubbed me the wrong way and I didn't even work on the film!