We have big box stores for pets.
We have semi trucks burning diesel to bring pet food and pet supplies to all parts of the world.
We devote some amount of farm land and livestock to feeding those pets.
It’s interesting when people suggest to reduce global human population but I have never heard anyone suggest to reduce pet populations as a method for combating climate change or for simply reducing resource usage.
The worldwide dog population is estimated to be 900 million.
There are 600 million to 1 billion cats living in the world today.
First up the three biggest CO2 producers are planes shipping and cars. And by a long shot. I agree that there are some corrupt activists the ones that are really trying to make a change are promoting non car centric infrastructure.
Planes and shipping are ‘only’ about 2% each, they’re far from the biggest polluters. For the big polluters you’ve got road transport, agriculture and industry etc…
https://ourworldindata.org/ghg-emissions-by-sector
banning non ZEV cars and trucks, nationalizing, improving, and electrifying the rail network, and shifting all the highway widening money to protected bike lanes and public transit would do a lot and none of it is individual scale