If moggy breeders genuinely believe that they are preserving the cats' wild behavior then they are sadly mistaken. They are doing nothing more than breeding surplus stocks of a domesticated animal which lost the intolerable wild behaviors several thousand years ago. The idea that neutering denatures the cat is a romantic notion based on ignorance of the cat in its genuine wild state and on a refusal to acknowledge an overpopulation problem which leads to healthy, friendly cats being destroyed for no better reason than there aren't enough homes to go round. Moggy cats still far outnumber pedigreed and pure-bred cats, perhaps by 200 to one. Pedigreed breeders select the healthiest cats and breed for health and vigour just as natural selection has done for free-breeding cats.
Studies show that groups of moggies are inbred themselves, as cats are naturally very territorial.
Moggy breeders frequently keep a couple of females which are repeatedly mated to the same tomcat, thus reducing genetic diversity. Those who allow their cats to mate freely with whatever comes along, exercise no control of the genetic health of the offspring and, at the same time, expose the female to lethal cat viruses. Unlike pedigree breeders, they don't scrutinise a potential breeding cat's pedigree for potential genetic defects which may not show up until two or three generations down the line. Then there is the suggestion that overzealous neutering encourages unscrupulous moggy owners to open up a market for their products. A product is something that generates profits.