If I had known that my kid would maintain interest in baseball and would actually come to love it with a passion and spend many of his waking hours trying to get better at it, I would definitely have started him off hitting left handed. I might even have had him playfully experiment with switch hitting at some earlier point in his baseball journey. But when he started, he seemed so disinterested and so undedicated to it, that I just mostly let him be and didn't push or coach that much at all out of fear of making it not seem all that much fun. My only thought is that at 7 whatever you do, don't take the fun out of it.