Preventing kids from walking down a public street is nearly as stupid as preventing mature women from doing so. Reminds me of Afghanistan and Saudi Arabia.
The major difference is that children grow up to be adults and are freed from the restrictions. If that is the most salient issue, then it's a bad analogy, but I don't think it's a "ludicrous" comparison.
Children do not have the same legal status as grown ups. They can't drive, should they drive because mature women can drive? They can't watch porn, should they be allowed to watch porn because mature women can?
Yes, kids not being allowed to walk down the street is stupid, but using the argument that mature women can do it so kids should be allowed to do it is not valid.