I would like to propose that this type of proposal might be the only way to keep solo staking competitive with liquid staking options.
Currently a liquid staker can get around 2.5x the returns of a solo staker via usage of leverage such as icETH | Interest Compounding ETH Index | Index Coop with minimal risk
Solo staking needs some kind of liquidity as well to allow borrowing. This seems only possible with allowing protocols to forced exit a validator to get their collateral.