This isn't true. Holes can become unlivable for a species for other reasons than the hole vanishing. The hole still exists, and further the collapse of the spec

This isn't true. Holes can become unlivable for a species for other reasons than the hole vanishing. The hole still exists, and further the collapse of the species filling it leads other species to collapse, creating growing fissures. Now, wounds heal, yes, if and only if given the time to. If you chop off your entire arm, you'll bleed out long before it scars over.