Of course governments don't comprehend the utility of it - they are an immortal social structure made of coercion consisting entirely of replaceable and self-replenishing parts. It benefits from immortality no more than eusocial insects would from a longer lifespan. Ironically any governments that would pursue lifespan extension is thus inherently "corrupt" in that it is technically self-serving on the part of its administrators. Except for those with a clear voter mandate setting that goal of course.

Secession is already baked in just about every government system excepting deliberately unstable ones (favored by autocratic using the threat of chaos when they die as a shield). To governments that functionally makes it a "solved problem".