Well, you could also flip it around.
Children are much more complex than cars, raising them well is much harder than driving, and failure to properly raise them can similarly result in loss of life, then it seems kinda silly to have requirements to be a driver and not a parent.
Do not children have any rights to capable parents, and a healthy upbringing?
While my memory on this is somewhat faded and dim, I seem to recall many years ago when there was some kid who wanted to divorce his parents.
While I think it's important to respect the very basic human right to procreate, I don't know if enough attention is placed upon the rights of children, who didn't really ask to be born or placed into the kinds of situations their parents put them in.