To add to what others said, it’s a tradeoff.

Your gaming PC not only runs up your electric bill from the wall, but the AC as well. It has to work to get all that heat out.

This is the equivalent of water cooling your PC, and piping it to a hot tub outside. It would heat it and evaporate water faster, but it’s basically free and uses basically no electricity.

That’s the tradeoff. It’s water evaporation instead of heat pumps. It’s trading water usage for lots of electricity usage, which in some cases, is well worth it.