... so they can't?

Hurricanes have a lot of energy. In theory we could expend all Earth's currently accessible resources to try controlling them. Barring some impossible to predict breakthroughs we cannot control hurricanes. Just like we (meatbags) cannot travel to other solar systems.

It's probably easier to prevent them from forming in the first place, for example by somehow decreasing the surface water temperature in some areas.

No idea how to actually do that though.

This happens all the time naturally. For example dust from the Saraha reduces the amount of hurricanes. The problem here that's like putting a bandaid on a laceration, the hurricane is the effect of a complex system and not a causation. By blocking it you're allowing that energy to remain in the system and have all kinds of other potentially terrible side effects.