In Jain Dharma, the approach differs for a layperson and a monk.

A monk’s vows are far more strict, because the monk has renounced worldly life. A layperson is not expected to practice monk-level austerity, but a layperson should still follow right repentance, restraint, and self-control according to their capacity.

If someone has done a harmful or unwholesome act, Jain practice emphasizes:

• Alochana: honest self-review
• Pratikraman: repentance and reflection
• Prayaschitta: atonement / corrective discipline
• Niyam / Sankalp: making a firm resolution not to repeat it
• Gradual restraint: reducing the cause, not just feeling regret

So for a layperson, the goal is not monk-level perfection, but sincere repentance and progressive improvement. Merely saying “I am sorry” is not the full Jain approach if the behavior continues without restraint.

If one watches 18+ content, from a Jain viewpoint it can intensify attachment, passion, and bondage of karma. The proper lay response is:

1. Acknowledge it honestly
2. Repent sincerely
3. Take a vow to reduce or stop it
4. Practice self-restraint according to one’s strength
5. Seek purification through pratikraman and disciplined living

So the answer is: No, you do not need monk-level sincerity as a layperson; but yes, you do need sincere layperson-level repentance and real restraint. The repentance should be genuine, not casual.