If you have smaller gaps between your driver, 3w, 5w, 3i/h, and 4i/h than you do your wedges you're just wrong. Tight gapping in your irons and wedges allows for more precision with distance control where you need it. 4° gaps is the way to go. The only gap where I would consider 6° is between my SW and my LW and that's because my LW is strictly used around the greens, it is never used as an approach club.