Why would this imaginary kid fare differently if it were legal? The exposure becomes pretty much guaranteed, instead of problematical.
And only after your guaranteed exposure will you wonder - What was that fuss all about?
"My kids not using weed" is another thing to value (and not unreasonably), orthogonal to freedom. It's fine to characterize that as something to value, but not as a variant of freedom.
"Satisfying intimacy with my S/O" is also something to value, but also not a species of freedom, and likewise unhelpful to frame as "freedoms from lack of intimacy".
You're abusing the term "freedom". Freedom is the right to act, not immunity from the effects of others' actions.
What about the freedom to keep slaves? The slaves are "free" to run away, they're just not "immune" from the actions of the slave keeper if they get caught.
This is why the term freedom is almost useless. People inevitably mean "the set of freedoms I care about", which will always come at the expense of other freedoms.