Positive parenting does not mean the absence of rules, it means teaching a child good behavior in a way that protects their dignity and self trust.
Punishment might stop a behavior in the moment, but it rarely teaches the child why it was wrong in the first place. Positive parenting focuses on understanding rather than punishment.
Instead of asking why did you do that in an accusing tone, try asking what were you hoping to get from doing that. This question opens dialogue instead of triggering defensiveness.
Positive parenting requires more patience than a quick punishment, but its long term results are far stronger.