Am I guilty of saying no one should have children if they can't provide for them?

I was at a family lunch when my sister-in-law mentioned that she wants to have another child, even though she already has two and can barely pay the bills. I said something like, 'I think it's irresponsible to have more children when you can't support the ones you already have.'

This led to an awkward silence, and then several people started attacking me, saying that I was being insensitive and that "children are a blessing, not a financial issue." My mother said I was being elitist and that not everyone has perfect conditions, but they still deserve to have a family.

I believe that bringing children into the world without guaranteeing a minimum of stability is unfair to them. But now I'm feeling a little guilty for saying it out loud. Was I an idiot for expressing my opinion?