Those I know don't because of money. Everyone seems to forget that children cost money.
You have to feed them food, medical, clothes, life and anything else. I couldn't afford to have a child in this climate at this time.
Yourself, has to be prepared to sink all in to. You have a secure job for the next 25 years, it's a big commitment.
The world is overpopulated as it is, adopt.
But however, if you can afford all of that and can still support the child then do it, have a kid.
Ae overall children aren't cheap. Easy to produce, but extremely costly to maintain.