Do you get mad when people assume they will get pregnant?

I see moms on here and women I know who just assume they'll be able to get pregnant again. Like you never know when infertility will hit you. I had my son and then couldn't get pregnant again. I'm still trying to conceive after two years. It's not as simple as "the next baby" because for some, there is no next baby. And for those who can conceive easily, don't take advantage of it and rub it in people's faces.