Something to consider;
It has been my understanding that high mins regulations pertains to dispatchability of high mins pic.
If weather is at or forecasted to be at or below high mins, no go. Now if unexpected weather at destination went to say CAT 1, then published minimums would apply. Much like diverting to an alternate. One of the many reasons why the no green on green rules are used.
I agree with the mass complications that could ensue if weather goes down at say destination and alternate enroute as well. I understand companies clarifying there own SOP to set actual approach minimums to the 100' above and should be clarified at company operational level. Although I believe the intent of the regulation has more to do with dispatch minimums.