Many countries have banned declawing. The Humane Society of the United States opposes declawing except for the rare cases when it is necessary for medical purposes, such as the removal of cancerous nail bed tumors.

People who are worried about being scratched, especially those with immunodeficiencies or bleeding disorders, may be told incorrectly that their health will be protected by declawing their cats. However, infectious disease specialists don't recommend declawing. The risk from scratches for these people is less than those from bites, cat litter, or fleas carried by their cats.

The truth about cats and scratching

Scratching is normal cat behavior. It isn't done to destroy a favorite chair or to get even. Cats scratch to remove the dead husks from their claws, mark territory, and stretch their muscles.

Cats are usually about 8 weeks old when they begin scratching. That's the ideal time to train kittens to use a scratching post and allow nail trims. Pet caregivers should not consider declawing a routine prevention for unwanted scratching. Declawing can actually lead to an entirely different set of behavior problems that may be worse than shredding the couch.

What is declawing?

Too often, people think that declawing is a simple surgery that removes a cat's nails—the equivalent of having your fingernails trimmed. Sadly, this is far from the truth.

Declawing traditionally involves the amputation of the last bone of each toe. If performed on a human being, it would be like cutting off each finger at the last knuckle.

It is an unnecessary surgery that provides no medical benefit to the cat. Educated pet parents can easily train their cats to use their claws in a manner that allows everyone in the household to live together happily.

Source:  Humane Society of the United States https://www.humanesociety.org/resources/declawing-cats-far-worse-manicure