Simple:
http://rationalwiki.org/wiki/Quantum_woo
And a more in-depth discussion of the subject by the good people at Nottingham:
Basically, it's an argument from ignorance co-opted by New Age and mystic types to try to gain legitimacy for their nonsense. Quantum mechanics is hard to understand even to people with adequate preparation, and impossible for those without, and it hasn't been helped by popular science writers trying to draw in public interest by dramatizing the inherent mysteriousness of the subject. Basically "No one understands quantum mechanics, so no one can prove that it
doesn't justify my particular assertions."
So the unfortunate result is that you get people who confuse the sense of profoundness and understanding with actual profound understanding (
https://en.wikipedia.org/wiki/Dunning–Kruger_effect) and say that, while they just aren't very good at math, you don't really need to be as long as you understand the
philosophy of the subject. This can encourage pseudoscientific attitudes to creep into the discussion, which detracts greatly from productive and instructive conversation about the subject.
It's also because there's a bit of entirely well-earned chauvanism about the subject among physicists. I certainly don't mean that in a bad way, when you spend years of your life in advanced education working tirelessly to even begin to understand the subject, you earn the right to be a bit elitist about it. A person who's put in that much effort and is taking time out of his or her day to help other people accomplish similar things has every right to be irritated when someone shows up on the forum talking about the quantum homeopathy healing crystals that the Big Pharma vaccine lobby
doesn't want you to know about and subsequently begins ranting about how anyone who tries to dismiss his nonsense is a paid shill for Big Science.