Paul Farquhar
Legend
Max is absolutely correct here. The specific rule that a dex save ends the effect overrules the general rule that you automatically fail dex saves. WotC make lots of errors, but this aint one.That bullet point is overcome by specific beats general in this case, not in every case of paralysis or with every spell. It specifically allows a dex save WHILE PARALYZED, unlike any other spell. Your statement is not correct about the bullet point being useless.
It would make more sense if subsequent saves were con saves though.