
As a breeder if an owner reported an unexpected negative result, then I woud use it to re-evaluate my breeding program.
Firstly I would not repeat the same combination that produced the health issue, though generally I would not do repeat matings anyway (have done it just once, when first litter was small).
I would then tend not to breed similar combinations and with the parent or littermate would tend to go for an outcross in the next generation.
All living things carry good and bad traits, and certain combinations will bring out the ones you don't want.
This is why anyone breeding needs to have as much information about their dogs relatives as possible and keep in touch with puppy buyers to get feedback good and bad on health and longevity so that future breeding decisions can best utilise the genetic material available avoiding increasing/doubling up on potential health issues.
This particular issue has been fo0udn to be common in some breeds (inherited) and may be rare in others, so that breeders advice in a breed where it's a one off may be that it's not an issue, but erring on the side of caution, especially as you haven't even started your breeding line is best advice.
Certainly it is unwise to breed from a dog that actual is affected by some health issue that may turn out to have a strong hereditary component.