Because screw filthy casuals, that's why. And you would be behind because while your level may not matter, the gun perks DO. Not being able to use the guns that have deliberately been made better than the old ones is a massive disadvantage, even if your health is not. They nerfed old guns on stat level so in spite of attack value not mattering, they would still be worse. They still get to run around and shoot each other in groups of 3v3 6v6 or ffa. They just don't get special goals to complete while they shoot each other. Cry harder, I have no sympathy for you and your casual scum kind. In fact, I'm glad they did it. I'd love to see less of you guys around.