I value the life of an animal equally to a human
Luckily, you are in a minority. The simple fact is a lot of time was spent on Air Traffic Control, ground movements, preparing and checking papers, loading the plane etc, taken up to fly out a bunch of pets, rather than some of the Afghans who have been helping the UK military and Government for the past 20 years.
The message is quite simple, some people in the West value the life of a cat over that of a person who has been working to assist the West.