I agree that anything made of plastic, when used in microwave, is not good to your health.
Also the normal rice cooker's internal pot is coated with non-sticking Teflon, which potentially is not healthy either, especially those low-quality ones that easily get scratched and expose the material under the surface.
With an electric-pressure-cooker, you use it the same way as a normal rice cooker yet can reduce the time of making rice to 25 minutes. Some of them have stainless-steel internal pots, which is of less health-related concerns.