I've talked to a lot of young people who say they don't want kids because they think their personal lives will permanently halt the moment they have kids. I spend a lot of time trying to explain that:
1) I still spend a lot of time with friends and can do most of my personal hobbies/activities on weekends. My wife and I are good at sharing the load. You don't need 2 parents watching kids 100% of the time.
2) The sleepless nights and diaper changes are a mere blip on the scale of a lifetime with kids. You deal with it, then the kids grow up quicker than you think. Don't let the idea of the first few months/years define your entire decision for how you want to structure your family for the rest of your life.
3) You actually like hanging out with your own kids. I talk to a lot of people who are anchored to some negative experience they had 10 years ago babysitting for someone else's kids, as if that was representative of parenting life. It's not at all. At the end of the day, I actually rush to finish up my work so I can have more kid time. It's fun.