Declaring gatekeeping to be always and forever bad is an unhelpful, untrue thought-terminating cliche. A wide variety of situations can be described as "gatekeeping", and while some are nonsense some are very good to keep. It's bad if we say "you must be 6 feet tall to be a doctor", because that has nothing to do with being a good doctor. But requiring that doctors get a medical degree and pass certification requirements is also gatekeeping, and it would also be insane to do away with it. Any time you call gatekeeping bad for its own sake you are engaging in a gross oversimplification, and should stop.