I don't see how those two situations equate. One is an impossibility, due to circumstance (e.g.: on the battlefield), and other is the willful knowledge that you want nothing to do with their upbringing because, using the OC's words, "I’d rather be earning a large dollar amount (doing something I enjoy) than child-rearing...".

Edit: In other words, there's no direct implication that everyone in the military, working abroad, or long-haul trucking wants nothing to do with child-raising. I'd imagine the situation is actually the inverse but the economic necessity for that work to be done (to provide a living) is what prevents that.

If you don't like those examples, consider a family with two busy working parents sending their child to boarding school. If they can afford a boarding school, they've got plenty of income. One or both of them could simply switch to a normal 9-5 job.

toomuchtodo would not be the first person to hand their child off for others to deal with, even if the decision to do so is hard for most people to understand :)