No, 1st and 2nd rounders should have the POTENTIAL to be those players. You don't draft players that high with apriori knowledge that they will never be anything more than a #3 receiver and a return man.
Where do you draw the line in your post? Kickers? Punters? ST gunners? Fullbacks? Nickel CBs? They are all important to a good team. A great punter certainly gets you field position. A great FB certainly adds yards to the running game.
At what point do you say to yourself, "This is stupid, our 1st day picks should be on guys that play 40-50 plays a game and not 15."? What team is so stocked, that they don't need potential top talent at OL, DT, DE, LB, CB, RB, WR etc...?