I always understand it as a way for anyone anywhere being able to join just with a computer and electricity, without having to beg any existing centralized entity for permission to exchange their "real" money for the crypto tokens.
And it seems to have been right, as exchanges are indeed where most fraud happens a what is actually targeted when a government does not like a cryptocurrency.
Still not sure how one is supposed to avoid this without handing over the given crypto network to a centralized entity that decides who gets what.