Animals are great.
And they need more supporters and love.
And, sure, your pet may add a lot more to your life than a random stranger or acquaintance.
And torturing and abusing animals (including a lot of factory farming techniques) is very wrong.
And the extinction of species is a horrific thing that isn't taken seriously enough.
All that said, people who treat their cat or dog like a child (and especially those who think others need to, too) are mental.
Your child carries your genes, your pet doesn't
Your child learns heavily what they need to do to survive from you, your pet doesn't
Your child grows and develops (mentally) enormously over their life, your pet doesn't
Your child will hopefully live a long, full live, even after you are gone, of 75 years or so. Your pet, maybe 10-15.
Your child understands and absorbs an enormous amount of what they are exposed to, your pet usually doesn't and usually doesn't give much of a crap.
Other people sometimes have allergies to pets, they don't have allergies to children.
Ask any parent "if there were a fire and you could only get your child or your pet" and see how long they need to think about it. Or "if you could definitely rescue one or a 50/50 chance of getting both, but if you fail you get neither".
Spoiling your pets is fine. Having some fun with them and being silly is fine. Thinking they're the same as children, no.