Only children

I am currently a mom if one beautiful baby girl, I love her to pieces and I’m super happy with her. My husband and I hav been trying for baby #2 and it hasn’t happened. Next step for me would be to get <a href="https://glowing.com/glow-fertility-program">IUI</a>, I am not willing to go through those treatments. I suffer from anxiety and I went through horrible ppd after having my baby girl. I’ve decided to stop trying and keep my daughter as an only child. My whole thing is, that people like to shame women for keeping only one child. Why is it so terrible to have only children? Why can’t society just let us be happy with our choices? Also anyone on here an only child, please describe your experiences. Thank you in advance