This is easy to answer, it's because it's always classified to be under the heading of "paranormal" where quantum mechanics is not. One skeptic was mentioning how even skeptics of the paranormal accepted wacky strange ideas from quantum mechanics such as multiple universes, quantum entanglement etc. However acceptance of those ideas are mainly in physics themselves and not surprisingly if this skeptic did his homework he would find that a lot of quantum physicists accept the overwhelming evidence for psi phenomena. As far as other fields of science go with their thinking on ideas such as multiple universes, quantum entanglement go i can say that biologists, neuroscientists etc don't really understand the implications of such ideas themselves. The relationship psi has with quantum mechanics their are many.
1] Both have replicated experimental evidence [ though psi evidence is always slashed by extraordinary claims require extraordinary evidence. This is a cop-out because their is nothing better than the scientific method to get at the truth.
2]. Both have yes wanky ideas that appear to be true.
3] Quantum Mechanics theories appear to have all come true the same that seems to be happening with numerous psi phenomena.
It is typically claimed by skeptics that governmens and universities wasted millions of dollars on psi and found nothing. That is completely not true, for example PEAR founder Dr Robert Jahn:
For 28 years, we've done what we wanted to do, and there's no reason to stay and generate more of the same data. If people don't believe us after all the results we've produced, then they never will... It's time for a new era; for someone to figure out what the implications of our results are for human culture, for future study, and - if the findings are correct - what they say about our basic scientific attitude.
Duke University's parapsychology lab closed down decades ago, but not because of a lack of results. Joseph Rhine moved DU's parapsychology lab off-campus, and continues to this day as the Rhine Research Centre. Rhine's research reported positive results. Stanford University's interest in parapsychology was disrupted when the Stanford Research Institute separated from the University and became SRI International. SRI International was the nursery for the Stargate remote viewing project, of which statistician Jessica Utts concluded: "Using the standards applied to any other area of science, it is concluded that psychic functioning has been well-established. The statistical results of the studies examined are far beyond what is expected by chance...there is little benefit to continuing experiments designed to offer proof, since there is little more to be offered to anyone who does not accept the current collection of data."
So you can see the skeptics are wrong here governments and universities have found very strong replicable evidence for psi.
20 hours ago