Childless and not sad

So I am childless by choice. There are a ton of reasons I do not want children. But other people (mostly women) make me feel bad. They say I'm selfish or that I will change my mind. The latter is the most annoying and frustrating quote. The world is overall in a terrible place so I find it selfish to bring a child in to this. Kind of like, why would I want my child to inherit this world? Also the personal selfish reasons do exist: I like my adult life and not being tied down to a kid, I do not want to go through pregnancy, delivery, or raising the child, I like spending my money on my dogs and other things that are not possible or harder to do with crumb snatchers running around all sticky. I've specifically have been with men who are not wanting to be a dad. My partner and I have decided that if that view should ever change we would adopt. Give a child who didn't have a choice to be born in this awful place, a chance at happiness. But still that is the "keeping our options open" choice, not the long term plan. Anybody else out there feel the same or similar? I'm starting to feel like I'm the only woman who isn't baby crazy and being bashed on for feeling like motherhood isn't my destiny nor will it define me. Even my friend who is a TERRIBLE mother is wanting to have another kid! I mean she even gets a mani/pedi when her boy needs diapers.