Would you encourage someone with no experience in chemistry to start mixing chemicals without understanding potentially dangerous effects? Would you encourage someone who is not an engineer to construct a bridge without adequate preparation and planning? Experts can be authoritative because their experience grants them the ability to know better than non-experts in their respective fields.
Yes, like any legitimate discipline of proper research.
> You are confusing its nebulousness for profundity.
Where you see a nebulous blob, experts see an ordered set of ideas. Similar to when an engineer sees a bridge as a series of forces and structures designed to mitigate them, or as when a chemist understands complex chemical formulas while a layperson may see a somewhat disordered series of letters and numbers.
Something isn't wrong just because you don't understand it.
How did the Bogdanoff affair happen?
The fact that bullshit is hard to separate from "the truth" is a very good starting point for postmodern investigation.