i last manually audited the bitcoin UTXO set about 10 minutes ago, automatically, because this is how bitcoin nodes work
i have all the blocks, i could run a replay right now and be certain that there is no inflation bugs
i'm not gonna worry too much about doing the full audit on a regular basis because every block it audits the new block to make sure it doesn't cause a conflict with the entire 15 year history, which is stored in a database on my node's SSD
you don't understand bitcoin, that's why you don't get it