Crossing up plants from regular seed stock isn't "breeding". It's happenstance. (chucking) Breeding takes years and multiple grows of plants and has a specific intent higher than just making seed. (aka...STABILITY) Sadly...we don't see much "working" of any lines theses days...just crosses of crosses of crosses of crosses/etc.
You can take specific female cultivars on through time via cloning...or via STS. (making more fems from them). This is a great way, IMO, to preserve that special plant for the future. (I am growing out seeds this season that were STS'd 5 years ago from a clone I grew for 5 years/selected from a pack of female seeds)
But everyone has their preference and it's all good as long as you are growing the plant