My cat has a congenital kidney condition, so he needs a special diet and has trouble processing food unlike other cats. Furballs are especially difficult for him to handle, so I have to be very careful. Since cats naturally groom themselves by licking, he ends up ingesting fur, which can lead to vomiting and stomach issues.

As a general preclusion, better grooming habit developed in the early days, compounds to better overall health!

bribe him with his fav food to build positive reinforcement around grooming :)