Totally agree but I still test all my lenses with a quick centering test. If it’s badly decentered I don’t keep it regardless if the corners will not be required. For landscape use lenses I also check centre, mid and corner crops at infinity distance at each aperture. I’ve created a photoshop action for this so it’s quick once I’ve taken the photos. This is how I quickly realised my 16-35 was a lemon
i will really test it if it's worst or not. it's not a cheap lens to just close my eyes.
i have a very good experience with amazon replacement anyway. the day you ask for replacement, they will ship you an overnight replacement. their catch is if you don't return the bad copy in a period of time(i think 30 days), they will charge your card two lenses.