I am one less parent raising a human for the hell of going with the motions, one less parent raising an UNWANTED baby. Because I don't want babies, I just wanted to feel loved and useful. And if I have a baby and I don't get the satisfaction I thought I'd get out of it, what do you think will happen? I will be stuck caring for human beings, I will feel stuck, and my babies will notice that I'm not 100% with them. I can't do that to another human, much less a child of mine.

I agree with you partly. So the assumed illusory desires of having children do not come true, you will feel stuck and realise that you were wrong to think that parenthood would be a walk in the park.
However, don't you throw the baby out with the bathwater before it is even born?

The realisation that parenthood is exhausting, challenging, frustrating and difficult can be titled "growing up". You are showing me a paradox right now. Knowing that it might be difficult for you, you have gone one step beyond yourself. Is it not the case, that you've realised something important? But you've given yourself a poor testimony in presuming a future in which this realisation makes you incapable of parenthood, in my view.
I would ask you if you are not willing to sacrifice too much?