Pointing to a particular gap or problem in that chain is useful; just ignoring it and saying "justify yourselves!" doesn't advance the debate.

Disagree. If you are asking people for money (and they are paying you), the burden is on you to provide justification at multiple levels of detail to your prospective or current donors.

But, but... then you'll have to, like, repeat yourself a lot!

No shit. If you want to change the world, be prepared to repeat yourself a lot.