It's the centralized exchanges, which are more akin to traditional financial institutions whose records are not on a publicly visible blockchain but rather private databases or... apparently spreadsheets... which fall victim to the same issues we have seen in the past in the traditional financial world.
Not really. There are plenty of decentralized exchanges which are proven, reliable, auditable, generally used by many without issues.
see: https://uniswap.org https://curve.fi/ https://1inch.io
It's the centralized exchanges, which are more akin to traditional financial institutions whose records are not on a publicly visible blockchain but rather private databases or... apparently spreadsheets... which fall victim to the same issues we have seen in the past in the traditional financial world.