The problem with Kuyt is that he doesn't have natural finesse, and that's why people get on his backs.
Yes, he is never going to skin a player, get to the by-line and whip a cross in, but how many important goals has he scored?! Plenty.
He is always leading the work-rate charts. Always up there for distance covered during games.
United play against the big teams with Ronaldo on one side, and a midfield of Fletcher, Carrick, with Park on the other wing. Park is our version of Kuyt.
Even if we got a world beating right winger, my bet is benitez would play a more defensive minded left winger (although Riera is quite solid defensively). He never plays two wingers. Only once did Pennant and Babel start together last season on either flank (and I think that was either in the league cup, or against lesser opposition).
The bottom line is this....
Yes, a team of Kuyts would never set the world alight, but on the other hand, a team of Lionel Messis would never win anything.