This is false. The (vast majority of the) Tornado Cash contracts were either deployed to Ethereum as immutable contracts, or updated in 2020 to revoke mutability (once the final zkSNARK parameters were included) [0], meaning that they could not later be updated by the user(s) that deployed them. Arguing that Tornado Cash is run by an individual means arguing that the entire Ethereum network is run by an individual. There was no way for a warned individual to comply with that warning.
[0] https://www.coincenter.org/education/advanced-topics/how-doe... - Section titled "Can Tornado Cash be removed or updated? If so, by whom?"