Why house cats hate water while wildcats love water?

It is well known that house cats hate water, or at least they hate to become wet.

Recently I came across some information on wildcats. Savannah cats for example, as a crossbreed of house cat and wild African cat, they love to play with water. From some videos of pure wildcats, it seems many wildcats are good at fishing. They have no problem get themselves wet in order to catch some fish for food from streams.

What happened to the house cats? Why have they become so hateful of getting themselves wet?