I think you misunderstand the cited article on water vapor.

The water cycle is self regulating, unlike other green house gases.

>> "However, water vapor does not control the Earth’s temperature, but is instead controlled by the temperature. This is because the temperature of the surrounding atmosphere limits the maximum amount of water vapor the atmosphere can contain."

The other non condensing gases, largely from man made sources, contribute to global warming and elevate the amount of water that can be vaporized per unit volume of air.

Cutting down on emissions by replacing oil based vehicles with electric/hydrogen fuel cell powered vehicles absolutely helps the environment. Cutting emission sources makes job of scrubbing the atmosphere of the green houses gases already present more achievable.