How else do you make a card work 4 times then be discarded without adding complex rules text?
By placing this restriction on it they made a limitation which is a) thematic (always a perk) and b) very familiar and fluid but accomplishes the same thing on average is saying it's discarded after the 4th use.
Sure there are times in which you reload 1x and then lose it but there are times your predator rerolls nothing but blanks or your autothrusters always runs into eyeballs. Very few mechanics are non-rng related and they simply vary in how they utilize their statistics based limitation.
