Horses and dogs seldom deal with monogenetic traits, basically they are breed for multiple polygenetic traits and when some of those traits don't show up for many years, then records like that are very useful and give a piece of mind. Ball pythons are just the opposite, almost all concern is monogenetic traits, so the trait is passed or it's not, generations before hand don't matter. Also, reptiles are very different and do not appear to carry nearly as many negative traits as many mammals, so inbreeding is a non-issue most of the time. Sure there are people who breed for polygenetic traits and some are against inbreeding, but that is not a majority of the hobby, so thats why it is, what it is.