Well, once you can't afford cable or 'net access, your recreational activities are limited.

More seriously, you never 'know' that you'll be perfectly economically steady and care-free for the 18+ years required to raise a child to middle-class American standards until that time has passed--at which point you probably shouldn't be reproducing anyways due to age-related defects.

Unless you are talking about "Hey, I'm in a homeless shelter, lemme get knocked up/knock up because why not", you paint in too broad strokes.