That's true, it's the person that takes the photo and the camera only captures what you point it at. So you need to either know or learn about how to compose photos.
The camera is just a tool, but an SLR is a better tool that gives you more control over how you capture what's in front of you.
If you're worried about size and weight, you can look at the other options like the small interchangable lens cameras from Olympus (PEN series), Sony (NEX series) Samsung (NX series), Panasonic Lumix (DMC series).
These offer better quality lenses than compact cameras (that you can also change), quality that is on par with SLRs, but without the bulk.
A pro photographer friend of mine has a rather nice Fujifilm X100 for a small carry around camera, it's got a sensor the same size and quality as an SLR and a good lens. That said, it's the price of a very good DSLR.