When my wife and I got together, we knew we wernt going to have children. I really didnt want a child due to how ****ed up this world already is, and she had already been dx with cervical cancer and had part of her cervix removed. Basically she was told she couldnt have children. We then became pregnant.
Our son is now 15 months old, smart as a button, and we wouldnt change him for anything in the world. As for having multiple children, people are free to do their own thing, but dont impose it on others. People often tell me that I need to have another, and I tell them Im fixed (@ 27 years old). They scoff and I tell them how hard my wifes pregnancy was, because it was a nightmare, and then they realize "ok, one is enought". But it should have to be explained. children are expensive.
My wife and I both work in healthcare, and let me tell you, there are a lot of people who shouldnt have kids. I, unfortunately, work at a facility with a dedicated childrens hospital. I say unfortunately, bc I have seen the ****ed up **** that happens to kids and I dont wish to see all the time. Kids who have to be sedated with ketamine bc their parents did meth while she was a fetus. The kids who always come in with cuts and bruises from the "daycare" after they picked them up. Hell, the kid who was shot twice in a drive by last month. The list could go on.
If you have one kid and thats your preference, then thats your preference. Spoil then, raise them right, and so on. That is your choice, not others. Tell them to **** off and have as many kids as they wish...