[nlnn]

This may be true in many cases, but I know quite a few people that chose not to have kids for other reasons.

For some, these are possible medical complications, e.g. history of heart defects, high risk of childbirth fatality.

For others, its that they had abusive or traumatic childhoods, and either don't feel they'd be up to the task of parenthood, or associate childhood with something so unpleasant that they wouldn't want to inflict it on others.