Like always when talking or exposing something is not free of risks, the ones who know, including the ones who genuinely want things to change, are all waiting for somebody else to get the ball rolling because they know that in the past most of the whistleblowers, or those who tried to be whistleblowers, didn't manage to change anything and usually suffered badly for what they did.

Because they didn't get the ball rolling because most people still just waited for others to join the first one, and either nobody did, or not enough did. The main problem has presumably been that the BHs have managed to get too much of those organizations that were supposed to "do something" under their power that also all the people working in those who tried to do something were silenced and gotten out of the case before anything got done, or silenced permanently.

But yes, the threshold of finally getting that "ball rolling" has never been really crossed because most people have been too scared that it would not happen and if they personally tried they would just become martyrs who never accomplished anything, apart from becoming warnings to anybody else who might think of trying.

I suppose the biggest thing the WHs may be trying for is really not changing everything by themselves, it's pushing us over that threshold and getting that ball finally rolling.