Yes. We get it. The DA is a decision altitude and you are expected to descend below it just from the airplane's own momentum and the time it takes to execute the climb for the missed. And you can descend to 100' if you have the right criteria met. Got it! In fact we've had whole threads on this. Repeatedly. You are correct on this point.
My point was that when you have an emergency, declare it and do what you have to do to deal with the emergency. If that means busting MDA or descending in below-minimum vis - if in the PIC's judgment that's the best thing to do then DO IT and don't fret about nonsense that will just get you hurt. Fly the airplane.
In this case, with a 127' ceiling the OP could have flown an approach and landed safely as long as he had enough engine power to do so. Where it gets dicey is when you don't have that and you have to land straight ahead - there is not much time below the overcast to find a suitable place.
So my opinion is that the minimums or DAs on the approaches are not the biggest reason for not launching into low crud - the practicality of an engine-out on takeoff is. In an emergency, if you're ABLE to fly the approach then you need not feel obligated to abide by the minima.