- Have good childhood
- Think things are good
- Accept the status quo
- Grow up
- Have kids because things are good and kids are happy
- Dislike changes to the status quo, because the status quo is good.
- Being an adult is hard. Tell your kids how great being a kid is.
vs
- Have bad childhood
- Think things are bad
- Reject the status quo
- Grow up
- Don't have kids because things are bad and kids are unhappy
- Approve of changes to the status quo, because the status quo is bad.
- Being an adult is hard, but it is better than being a kid. Don't tell your kids that being an adult is great, because you don't have kids, and are too busy living your awesome adult life to give life lessons to kids.
Hence, it will always be statistically more likely for kids to have conservative parents who tell them how great childhood is.