Two more arguments for induction:
-- I mentioned he was 5th all-time in Receiving TDs. Everyone else in the
Top 12 is either in the Hall or headed there, with the possible exceptions of Terrell Owens (4th) and Andre Reed (10th).
-- As is frequently pointed out, Canton is not Cooperstown. There are lots of precedents for players with relatively short but exceptionally successful careers being enshrined, while lots of steady producers who played forever and put up big counting numbers are left outside.
Gale Sayers is the prototype for this kind of HOFer; he's not even in the Top 50 in Rushing Yards or TDs.
Steve Young is another good example -- he's 21st all-time in Passing Yards, just as Moss is 21st in Receiving Yards.