>>55529604>Water has only two weaknesses, one of which is to a pretty uncommon offensive typeFairy has two weaknesses as well, and both are to less common types than Electric and Grass.
>They also basically all get ice beam to take care of grass too.And Fairy can cover all 3 types that resist it with Ground. Water/Ice can't break any Water type while Fairy/Ground breaks every other type in the game that doesn't resist Fairy and have an immunity to Ground. But there are more Pokemon with a Water immunity than there are Ground immune Steel/Poison/Fire type Pokemon.
On top of all that, Fairy has an immunity, which Water doesn't, and Fairy gets to carry Moonblast which remains at 95 base power even when Surf/Ice Beam/Flamethrower/etc were nerfed to 90.
Physical Water types ARE better than physical Fairy types because Play Rough is dogshit, but Fairy is better in every other regard.