Great to chat with a fellow gardener!
Analogy for you: If soil is compacted, nutrient poor, desiccated & contains toxins, mulch won't fundamentally change the situation.. Choice of licorice root vs red cedar mulch to cover the soil is irrelevant, as neither will change the growing situation. One has to fundamentally change the situation by adding sand, peat moss, cow manure or other amendments to make the soil more friable, etc., add water & other nutrients, and deal with the persistent toxins.
Wound dressings are a cover on a wound. Occlusive wound dressings create a "micro environment' around/over the wound. These don't address the progressive atrophy (death) of arterial blood supply (think: persistent toxins) due to diabetes which leads to the inability to "heal the wound". One can visualize progressive diabetic foot ulcers as being somewhat similar to lower limb die-back syndrome in some plants. If a wound dressing could change the course of diabetes, diabetic foot ulcers would not be such a persistent challenge.
I follow ARTH on behalf of a friend.
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