That’s how you like to go about it and that’s cool but if you want to understand why you get certain types of phenos pop up from different P1 (parental) stock it’s good to have a basic understanding of dominant and recessive traits and how they are passed on through successive generations ie f1,f2,f3 etc. The same rules apply to all genetic pairings and can be worked out with maths to give a good guide as to what traits the offspring will carry (punnet square ). It’s probably more important for guys doing small numbers to understand these principles than a guy with a greenhouse,they can rely on weight of numbers to find the ideal plants to work if you only have limited space you have to have a really good eye for detail.