>If that's the case, then just don't say silly generalizations like
The context of our conversation was video games. No koan, maxim or quote contains the unquestionable logical truth in all applications.
Ultimately your video game restriction might not even matter. If the kid goes through any kind of teenage rebellion from your strict rules, that will be a "bad" wisdom gaining experience itself. The only real choice you might be making is whether to deal with confrontation in small doses or in one major flame out.