Lets be realistic, its hard no matter what job you have... anything is possible... its the stigma that is attached to having kids in the tech industry that is the reason why people need to read posts like this...
It is definitely harder for people with lower salaries who needs to have two jobs (I know some!).
It is also easier, at least here in Quebec, for people that works, as an example, for government. They have a lot of vacations, work less hours per week, flexible hours, sick days, etc.
I am glad I work @ Rainforest QA and to have so much flexibility, which makes it easier for me and my wife!