White sage is threatened in the wild because of irresponsible harvesting. Unless you personally grew sage or personally know it was ethically wildcrafted don't use white sage smudge sticks! Alternatives are rosemary and cedar, they are easily available and highly effective.
Debunking the woo-woo spooky super powers of spirit work and astral travel. They are simply a tool and a skill that anyone can develop. They do not define you as a spiritual person. A lot of people are afraid of spirit work because it is so taboo. People that are most afraid tend to be the most sensitive people that are untrained. They are experiencing it strongly but don't understand what is going on, and so they get really really creeped out. That creepy feeling is just what dead people energy feels like. It is a part of the veil between our world and theirs and keeps the realms separated. For the most part while we are in this material realm we are in no danger from the spirit world. The physical form and physical world protects us because their abilities are limited in our realm. If they want things done in our world they need our help. They can mess with your head and you just have to learn to tell the difference between your own thoughts and another being's influence. Things such as high power electricity and running water are other aspects of our world that makes it difficult for spirits to interact.