Notice how the frame of reference shifts when two different questions on choice are asked. In the case of abortion, it’s not about health or the good of the community, it’s about the rights of the individual (specifically the rights of the born over the unborn). In the case of food, it’s about health and the good of the community. Ending the life of a child is a healthy choice, while drinking a big glass of soda is not. Drinking a can of soda is a crime against the community, while killing your child in the womb is not.
This is a mixed up worldview, standing on the pitching deck of relativism, making arguments of convenience, rather than actually trying to make coherent sense of the world.