Most of their diving (as mine) is done off MA, although we all go down to NY and CT occasionally.
I made that NE reference to get across to you that the definition of "comfortable conditions" can vary significantly based on what you're used to. For example, in NE, visibility like you describe as being poor (30ft.) is considered great. Then add in 42 degree water at depth (year-round), the associated bulky dry-suit, and night-like conditions at depth (>200FSW) and you begin to get the idea. When I dive in FL, I'm definitely respectful of the currents (and of course high seas are a problem anywhere), but the warm waters and improved vis really make it a completely different (less stressful) experience.
So please don't try to find something amiss in what these guys were doing, because there isn't anything. It may not be something you would do right now, but it's something that they were properly trained for and experienced doing. These guys are NOT cowboys, take my word for it. The question to ask yourself is if you had a serious problem under water like this person did, would your buddy risk their very life to try and help you? This one did.