Your first two sentences use the words "realistically" and "actually" in a vain attempt to justify your argument. Sorry, but you fail.
Two fatal accidents (L2 & EC225) with full independent investigations do not find a root cause. The latest EC225 accident also highlights that HUMS did not provide any indications of an issue, yet resulted in a catastrophic failure with no chance of any survivors.
I'm not going to waste bandwidth drawing the lack of comparison!
I do wish there was a "bullsh1t" coughing emoticon that I could use.