FanFiltration said:

I want to know why it's called "Star Trek", yet most of the films take place around Earth. Let's get out into deep space! You know, that place where no one has gone before. Generations & Insurrection seem to be the only two films in the franchise that do not include any Earth bound segments. And that is excluding the Earth holodeck scene in Generations.

Because films have to appeal to a broader audience than the tv show. People care more about Earth than they do about other planets.