Probably not. It's not a professional camera, and even those lie. But that shouldn't stop you from taking great photos. What you can do is shoot several bracketed test shots in different lighting conditions and compare the embedded JPEG to the real raw data which RawTherapee shows you, to learn how much your camera 'lies' and how much you should over-expose, and whether this difference is always the same or whether it changes depending on the light conditions.
Setting your camera to its most neutral settings may help, a tiny bit.
P.S. I am talking about minimizing noise in the real raw data, not about getting it to match the thumbnail or embedded preview.