But there's a ton wrong with that thinking.
First: Exercise takes time away from work. Vacations take time away from work. Sleeping takes time away from work. And yet, even the most die-hard workers realize that they have to exercise, take vacations, and sleep. And that doing so makes them better people, healthier and more well-adjusted. And even better able to do their jobs.
I can't speak for everyone, but I've found that my children -- now 19, 17, and 14 -- have not been distractions from work, but complements to it. They have helped me to find insights, to understand myself and the world, and to generally be a better person.
Second: It's possible to make lots of money and have a great career with children. It's also possible to do so without children. So it's not an either/or situation. Yes, you'll have to prioritize. Yes, you'll be frustrated sometimes that you can't finish a work project because the kids need you. But it also gives you some perspective, understanding that even if your project is delayed by a day, that's OK.
Third: There's no doubt that children can be maddening, frustrating, and time consuming. Especially when they're young, they demand lots of attention. But in my case, all of that frustration was easily counterbalanced by the joy, excitement, and fulfillment that comes from having children, speaking with them, and learning from them.
Finally: If your job means that you have to dedicate yourself to it, to the exclusion of everything else, is that really a job you want? If your company doesn't encourage you to take time with your family, or for yourself, what sorts of people are working there, and do you really want to be working there?
I don't know if I would be a worse consultant, trainer, and developer without my children. I would be a different one, though. And given how happy and successful I am now in my personal and work lives, I wouldn't want to be that other person.