Are you even a pilot? Like seriously. Claiming a ceiling at those on the plate is illegal tells me you have no idea what you're talking about.
You go shoot the approach that has vis a half mile above mins. If you don't see anything, go missed to your alternate.
I don't know a professional pilot that has an issue shooting an approach to above mins or a missed.
We train to actual mins and I'd expect any pilot to be able to fly that as well. Try that at any certificated carrier. "Ya, airlineX ops, we're going to divert because the clouds are at MDA and the visibility is a half mile above mins and I think that's unsafe."
You won't get fired, but some re-training will be in order.
Also all that LOI that you posted says is that, yes you must in fact have the visibility to shoot the approach, and you should consider all the weather.
Perhaps you're not following what I have been posting. This carrier uses low time FOs. Add in weather that is marginal for the approach, pressure to get the passengers to their destination, etc etc etc.. you're putting the odds against you as PIC. And yes, I am a pilot, ~3100 hours, ATP, type ratings etc, of which ~2700 is turbine PIC. I have flown 135 and 91 corporate operations. I know the game, and know it well.
All I'm saying with my analysis is that I believe the crew found themselves with the chips stacked against them, made an unstable approach, and bought the goods and wares on sale at that price. And a hefty price it is indeed.
You can argue to me all day long about what is legal, and yadda yadda yadda blah blah blah. I'm going to tell you what is safe, as PIC, all circumstances considered. Of course I don't have ALL the facts, but I have enough information to glean a decent picture as to what took place.
For me, as PIC, I do my best not to find myself in a position such as this, and if my decision making bothers you, well, go forth Mr. White Knight, and get the job done.