Sorry, over-engineered is the dumbest thing I've ever heard. Leaving a hole in the fender liner where dirt, mud, pebbles, ice, road salts etc. can get in is the same reason I had to replace my steering knuckle/damper joint. Same reason being, no protection from the elements. Put them in if you can find them, otherwise it's just another excuse to reject an issue caused by any of the above.