The issue of declawing has been a hot one for about 20 years now. The main reason for declawing is to stop a cat from scratching furniture, people and priceless rugs. There is no medical reason to declaw a cat, though, and the declawing removes the front of the toe which can affect a cat’s balance.
It’s simpler and more humane to teach your cat some claw manners instead. Set up scratching posts around the house, including the hanging kind which you can attach to the the couch. Use catnip to attract your cat. You can also teach your cat to leave the furniture alone and to keep her claws in when a person is holding her. It just takes a repetitive “No!” when the claws come out and treats when she obeys. A little time training is a much better alternative.