Spaying reduces the risk of mammary cancer. Spaying reduces unwanted puppies. Spaying reduces the risk of entire dogs breaking into your yard and savaging your male dogs to get to a female in heat. Spaying can increase quality of life (I have a mare who would agree). I put both my dogs through elective gastropexies, again to improve the potential for longevity and reduce the risk of a terrible, horrendous death. None of this was for “convenience”, but to improve the quality of life. Also, as both my dogs are purebreds and uncommon AND there is a high demand for cross-bred “designer dogs” using the breed, I also had both desexed to prevent pet theft. Their collars do not say “My name is…”, they say “I am desexed and microchipped”.
That is not “convenience”, that is good pet management and having an animal’s welfare at heart.
The same cannot be said for cropping, docking, or declawing. Dew claws, yes, in individuals where the claws snag and tear. But a tail? Ear flaps? Knuckles? No. My breed was docked for years. I would never - ever - buy from a breeder who supports docking now (moot point as it is illegal here). A long tail is a beautiful thing in all dogs.