You have remained obstinately ignorant of the facts.
Like everything else about Science, Taxonomy is in the continual process of refinement. At the time that the US government became interested in establishing a wildlife conservation program, about a hundred years ago, the so-called Eastern Cougar was seriously considered as a subspecies, and US agencies appropriately followed the guidelines of Science.
You also fail to acknowledge that taxonomic distinctions are not always strictly genetic.
Even so, as the consensus changed in the scientific community, there were also regulatory and practical considerations that have led the various agencies to continue to maintain the distinction. One of these is that it is a very convenient way to label a breeding population within a region for the purpose of allocating conservation resources. In the sense of shared lineage, this does indeed represent a specific gene pool, even if it does not meet the current standard for a separate taxonomic subspecies. Similarly, "extinct" has a specific legal connotation within the context of conservation agencies that is not necessarily completely synonymous with the scientific usage. Context matters.
Your shameless equivocations shall not be missed.