There are Christians and Muslims who denounce mysticism as being dangerous while there have also been Christian and Muslim mystics. Transformatsiya is a fictional religion created from the influence of Judaism, Christianity and Islam and was formed through mysticism and contact with the spiritual being Tanisha who revealed previous religious teachings to the early followers. Part of the religious teachings include how to safely understand the influence of the spirit world.
Under the religious Zakon Law, mysticism and occult rituals are restricted to sanctioned mystics because ignorant exploration of the spirit world is incredibly dangerous and is likely to lead to demonic possession or influence.
Unsanctioned mysticism is punished by mandatory intervention from social workers of the PKVD, court order to see a psychiatrist who is a sanctioned mystic, or in extreme cases confinement to a mental hospital where they would receive spiritual guidance.
All the prophets up to Tanisha (who is a spirit) are considered mystics who received divine revelations from God or his messengers through the spirit world.
Look at the number of faiths in the world today. Look at the number of sub-groups under each of those faiths - Sunni, Shia, Sufi and Salafi Muslims. The three branches of Buddhism. The almost innumerable smaller faiths that exist in the shadows of the handful of massive ones. Consider how the implementation and legal rights of those faiths exist between various governments, sometimes even in the same region.
Now advance all that a couple hundred years in the future.
Add several dozen star systems and thousands of space stations, many of which could modestly-sized region on their own. Now think about how many faiths and interpretations there likely are out there.
That is the answer. It’s nigh-impossible to count the views on it. Legally speaking, the UNHA’s view is more that both mysticism and non-mysticism are permitted, so long as it doesn’t prove harmful to onesself or another person. (The definition of “harmful” is, of course, subject to near constant legal interpretation.)