Question: Why is talking to the ten about your personal feelings, experiences, and sensations not allowed? How can I harm myself and my ten with this?

Answer: When you reveal your personal feelings, you harm yourself and everyone else. We can only talk about our common aspirations. Period! That’s it!

I see that this is not clear to you yet. Therefore, accept it as a law. There are many laws that we follow and live by until we understand their necessity. If you do not do this, you will harm yourself, specifically yourself.
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From the Daily Kabbalah Lesson 2/23/20, “Preparation for the Convention”

Related Material:
Is it Beneficial to Share Your Personal Feelings?
Conveying Spiritual Feelings
Do Not Reveal The Secrets Of Your Heart