Slowing down air currents doesn't necessarily decrease extreme weather. Air currents are a means of energy diffusion. Stopping up that process is more likely to just exacerbate local maxima. Stabilized local maxima can be useful for energy extraction while being quite inconvenient for just about everything else.

Energy races to heat. Heat tries to diffuse. If it can't, it's still there. Moving it still costs more energy.

Entropy always wins.