[William Cloud Hicklin]

However, the later texts take the "it is said" form; and Tolkien does not always mean that those "it is saids" are really true- sometimes they represent the wishful thinking of later generations. For example, "it is said" among the Longbeard Dwarves that Durin received his Ring, not from Sauron, but from Celebrimbor himself. That one is pretty obviously not true; post-facto Durinite propaganda.

Keep in mind that only Iluvatar, not Manwe or any of the Valar, can take away the Gift of Men; and that the rule was waived for Elwing and Earendil because they were half-castes, and because they were the agents of Doom. While Tuor was certainly important, he wasn't more important than Beren! Also- if Tuor was alive and kicking around Valinor or Eressea, don't you think some of early Numenor's frequent Elvish visitors might have said, "Yo, Tar-Minyatur, your grandpa sends his best."

In my head-canon, at least, T&I were lost at sea, but later Numenorean tradition wanted a "happy ending."