Last I checked, swearing and blood don't make things better.
Take, for instance, a poorly-written game like Tales of Symphonia, which features an excessive amount of language seemingly just for the purpose of seeming mature or something, while Final Fantasy XII, a much better-written game, has roughly two instances of "swearing" and it's very mild at that, but deals with its environment and circumstances much better and makes a heck of a lot more sense. Things don't need "mature" content to be good, and lacking language and gore doesn't make something "child-oriented".