I disagree. It's a great suggestion because it provides purpose, a reason to get out of bed each morning and a drive to provide and protect your children. The fact that he can't 'return them' makes the stakes high and only adds to the worthiness of the pursuit.
He'll still have days of struggle, we all do, but he'll have a fulfilling reason to push through them.
Or his burnout will quintuple, and despite having a fulfilling reason to get out of bed, he'll still be struggling - except now, a child gets to suffer through having a father who was not ready for parenthood.
There are unhappy parents and children of unhappy parents that are wincing at the idea of rolling the dice with a child over the idea that being trapped by a decision will somehow force feelings of fulfillment. I am all to familiar with how this kind of thinking has lead to depressed and resentful parents and children who suffer from them. You should have children because you want to.
“Many people find fulfillment and purpose in having children” = good advice
“Having children will give you purpose and make you feel fulfilled” = you’re projecting
He'll still have days of struggle, we all do, but he'll have a fulfilling reason to push through them.