It is rather a necessity – such a haircut is most often done for long-haired and fluffy cat breeds.
Why do a hygienic haircut for a cat

to normalize the thermoregulation of the cat’s body – long and thick hair, especially in summer, contributes to the strong overheating of the animal;
to help sick and elderly animals who do not take enough care of their fur – a haircut saves cats from stuck together and heavily matted hair;
to rid the cat of pellets and tangles – matted hair tightens the skin, disrupts blood circulation, causes itching of the skin and discomfort in the cat;
hygienic hair cutting is indicated for certain skin and parasitic diseases;
with increased secretion of glands, including paraanal, it is recommended to cut the area around the genitals;
for long-haired breeds, the area of ​​”pants” and under the tail is cut out so that excrement does not stick;
Grooming helps to reduce the number of bezoars – hairballs that form in your cat’s gastrointestinal tract.
cats with long and strong shedding are sheared to keep the house clean;
before carrying out medical procedures on the skin;
long-haired cats are sheared if their fur is very tangled.