Instead, if you want children, go for it while you are young, adaptable and have tons of energy.

I can appreciate the logic in that, but I'd caution anyone against jumping into a commitment of that magnitude before they've achieved some minimum threshold of maturity.

To illustrate my point, the rate of divorce declines rapidly as the age when married increases. In my experience, the same factors that contribute to a successful relationship also prepare (to the small degree that preparation is possible) a person for the utter, absolute responsibility and sacrifice that is parenthood.