There was a time in my life when the thought of having to address a crowd would make me sick. Since then, I've been able to develop the confidence to address entire church congregations, and even sing to them without accompaniment.
James Earl Jones - the voice of Darth Vader - had a severe stuttering problem when he was a child. He has since developed the confidence to become a world-renowned actor and voice-over artist.
Confidence can be learned.
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The mere fact that science may not yet adequately explain an object, event, or experience does not mean the immediate explanation should automatically default to a conspiratorial, extraterrestrial, paranormal, or supernatural cause.