Apples do not grow true to type, meaning the seed will not produce an apple that is identical to the mother tree. This has caused many different varieties to be grown in the early history of America. Look up Johnny Apple Seed. This video link shows John Kohler trying 40+ apple varieties grown in a previous Sonoma Apple Farm location.
Only a few apple varieties are available in your grocery store, not because they are the best tasting, the most nutritious or are the superior cultivar. This is so because of picking, shipping, and marketability. I invite you to explore the varieties available for not only apples but other various fruits and vegetables at a local farmer's market.
Don't let a grocery store chain determine what your diet has to be!