What's the point with that quite lackluster story in Endwalker?

[Caurcas]

Do we have any evidence of an Ancient dying of age though? If they were effectively immortal then…there wouldn’t be a last breath outside of one of them being killed by a creation. Like what exactly are we arguing here. Are haurchefant Ysayle Papalymo etc in the wrong for not striving to the end and instead cutting their own lives short?

Ysayle, Horse, and Papalymo all died in struggle, so they lived to the last. Whereas pre-calamity ancient could finish some paperwork, then decide that's all they can do and decide to put a .44 caliber hole in their aether, not living and self terminating.