Just for the last one, even the best parents can have horrible kids. I feel that we often overestimate how much influence parents have on children compared to their peer group, genetics, and other factors.
I agree completely, but my statement doesn't contradict yours.
I said: bad parent implies bad child. You say: good parent does not imply good child. These statements do not contradict each other.
Having that said, my initial statement is still flawed, as there are very nice children that have pretty awful parents. Probably because of reasons you outlined (peer group etc.)
We've forgotten this old wisdom.
it is very much unlikely, though. and you know that.