Why is it scary to go into the subconscious?

It's scary because it can be scary.

When you enter the subconscious mind, your sensory nervous system will be separated from your conscious mind, that is, you will be in an unprotected state of consciousness.

It's the same as standing naked on the street, a random person asks you a question and you'll say it, unconsciously hypnotized.

The fear in the depths of the subconscious mind will make people feel very timid, and they will be scared involuntarily.

The mind is divided into two parts, one is the conscious mind, the second is the subconscious mind, the power of the subconscious mind is 10,000 times greater than the conscious mind, expanding out to make it easy to fear.

The subconscious mind will compose real things according to the picture we have in our mind. The subconscious can't tell if something is true or false, and once it is accepted, it eventually becomes true.