2. Question: Whether it is on a Torah level or Rabbinic level why is it absolutely permitted to nullify a prohibition by accident though on purpose it is forbidden since either way it is inevitable (psik reisha) that it is nullified and a psik reisha is forbidden even if done without intent?
A. The issue with nullifying a prohibition is not taking the prohibition seriously.
Answer: If not taking the prohibition seriously is the problem then if you nullify it by accident then the problem doesn’t apply even if the results are inevitable since the intent was never to make light of the prohibition.