Is it wrong of me to be ttc and not have high income?

So my hubby and I have been ttc for 8 months, and people have said to me before that if I can't afford a second car, I can't afford a baby and shouldn't try to have one. I live in West Virginia and there's a program called WIC (Women, Infants, Children) and it provides things for women who don't have a lot of money. My one sister is a single mom and uses WIC for her 4 month old and used it through her pregnancy. My oldest sister used wic with both her kids and she was married and they were both working good jobs. So I know it's doable. I'm starting a job next week and my husband makes good money for the area we live in. I'm just wondering who all thinks we shouldn't be ttc because we don't have the money to buy a baby luxurious things that they might not ever need. Also, I read a study saying families who make less than $30000 a year tend to be happier than people who make over $60000 a year.