I'll tell you why.
There was once this
insane
game called Demon's Souls. In that game, there were no jump mechanics. Jumping is cool and all that, but it does nothing for me except adding some additional platforming to the game. Once you're 100% comfortable in abusing the i-frames of the roll in order to dodge shit, you realize you want to bang your head to the wall when you, by mistake, jump instead of rolling from the attack.
You see I tend to sprint a lot and I combine that with the roll. If I sprint and roll at the same time, the jump comes up. And the jump has next to zero i-frames. It'll result in my getting hit. And everytime this happens when I replay DkS1, I want to destroy the game.
Yes, L3 is an awkward button to press. But I am never in dire situations whenever I jump. I don't use jump in combat except during PvP. The jump is fucking terrible in combat.