Ya know......the cliche of "One out of ten doctors recommend..." could fit here. If the majority of experienced breeders/keepers are giving you the SAME advice, common sense should dictate it is a good idea.
She could have ended all of this with a simple "Okay, thanks for the advice." and none of us would have been the wiser to her continuing her irresponsible husbandry. It has nothing to do with her age, it is all about being a stuborn individual. When we have an issue with a pet and ask advice from those who have more experience, we do everything we can to correct the situation.....we are grateful for the advice and say so. I guess some folks just don't care about the animals as much as they do about their ego.