Are you suggesting that people can't get ripped off buying overpriced older homes, because they sure as hell can. You're also not going to know everything about an older home without a proper inspection which is what people buying ANY home (new or old) should get anyway. People buying new builds shouldn't have to be spending time on fixing things right off the bat, so this idea of buying a cheaper home that you know is going to require time and money to fix up isn't an answer.
Nothing you've said has convinced anyone think that you have any idea what "investment" actually means, but if all you really want to say is that you don't like the idea of newly built homes then that's all you had to say. It's a weird hangup that ignores a lot of detail, but whatever.