You are correct. Do not focus on this. It is just that your genetics are such that your collagen fibers that make up the disc wall (annulus) are more “brittle” and you suffer more tears. I call this CBS (crappy back syndrome) and it is not a big deal unless these discs become symptomatic. I cannot tell you how many patients I see that have this with little or no symptoms (they come in with other problems and CBS is found as a side-note).