Whether or not warrants were obtained for their activities, is, however, an objectively verifiable boolean fact.
Sure, but that doesn't help you either, as there are many other precedents besides NSA programs for situations where the government can compel a search without a warrant. This is permitted by that pesky little word "unreasonable" in the Fourth Amendment.
The idea that constitutionality, or any other question of legal interpretation, is a matter of objective fact which has a clear, crisp, true or false answer is, while a comforting illusion, not at all even remotely true.