Perspective is the way you see things, ie. an opinion.
No, Zack, a perspective is not the same as an opinion, even though it
is how you see things. One's perspective may be obstructed by draperies over a window or a shadow or something else, and it may be enhanced by various means as well, such as using a mirror to see around a curve or shining a light into a dark corner. What I'm trying to do is to pull the curtains back, shine a light, hold up a mirror so you can gain a different perspective. But instead of looking, you just squeeze your eyes shut, Zach, and say that whatever I and others tell you is behind that curtain or around that corner or in that shadow doesn't exist simply because you can't see it from your limited perspective and you won't look.
While I'm not a lawyer you can't discredit agency standards when talking about a plaintiff vs. defendant because that is what it may very well come down to. Their duty of care is dictated by the standards they follow via the agency they teach under, if they can dictate their own reasonable extended standards, that by all means increases the potential (not necessarily output) for safer divers.
Zack, you're simply wrong here. Duty of care is a legal standard based on how a reasonable person could be expected to perform in a given situation. It is not linked to any agency standard and it doesn't change according to the standards of different agencies, and certainly not because an instructor takes it on him/herself to extend agency standards. In other words, the duty of care required of an instructor will be the same regardless of whether that instructor is teaching at/above the (minimum) standards required by his/her agency. Look it up. And while you're at it, look up past negligence cases involving scuba diving and see how many of them focus on the agency standards. You'll find that cases revolve around only duty of care and that when agency standards come into play at all, it's because an instructor has violated them. In that sense, it wouldn't matter whether the agency standards were PADI ones or NAUI ones--if the instructor has violated standards, that will be held against him/her in considering a failure to maintain the appropriate duty of care.
Not that I expect you to know this, but I was certified under the PADI system with what I feel exceptional instructors.
I do know this, as a matter of fact. And yet I'm sort of fascinated by your case because I've read lots and lots of your posts expounding on a variety of topics about which you are not fully informed, and yet about which you continue to make categorical statements as if you had insights gained through expertise.