When governments ask platforms to verify adulthood, they assume the tools of verification will be as common as adulthood itself. In Australia, Valve has answered a legal mandate to protect minors by choosing a single credential — the credit card — that a growing majority of young adults no longer carry, quietly locking eligible people out of content the law never intended to restrict from them. It is a reminder that compliance and accessibility are not the same thing, and that the letter of a rule can sometimes betray its spirit.