those
particular tokens could have been sold for close to $600M
or yield farmed with to earn things that could be sold - some of the DAI and others were deposited into Curve to do exactly that
and even if they sold them over time at a small haircut, that would have been on Uniswap, and all the arbitragers from exchanges would have tried to buy the discount and sell at the higher price on custodial exchanges, providing continual liquidity for the hacker
yes, this damage control is pretty amateurish