Adoption doesn't promote over breeding 

There is no question about the love of an animal, they are big awesome, furry machines of endless love. Most mommy animals that find themselves having kittens/puppies are a one time thing, and are spayed/neutered after an appropriate amount of time. As opposed to breeding which promotes using the animals (sometimes and not all cases) as a means of a way to make an income, and ultimately becomes a cycle of the mother having litter after litter. Cats/dogs and all other living animals deserve to be loved and to live a healthy life, through some breeders that right to a happy life is taken from them, and they are stripped of multiple sets of their babies.

Spaying and Neutering 

One of the most important things about getting an adopted animal is the fact that most organizations, pounds, shelters, fosters, etc want the new animals to have the best and most healthy life possible, and they ensure this quality of life by spaying and neutering the animals before they are given to a good home.

This single act of spaying and neutering the animals is the most responsible thing an owner can do, it not only reduces the likely hood of overpopulation of said species, but it also makes sure that each and every animal can have its best life.

love is love

There is nothing cute about paying over 300+ dollars for a specific looking animal, and people do it all the time. There is no difference in the love that is received from a 300+ dollar cat and one that is 120+ dollars. The love and pure bond that is shared between the owner and the adopted pet creates a bond that can never be broken. Creating a home for them so they don't live in a tiny window is something that these animals will thank you for forever with their devotion and love.