I'm not sure I understand. Firstly, banks can't offer their foreclosed assets as significantly less than market rate because homes are used as collateral in a mortgage, so they'd have to just stop offering mortgages, which means only cash buyers get homes
Secondly, even if a bank did offer the foreclosed homes much cheaper, it won't fix gentrification, it just means whenever a house gets foreclosed a bunch of cash buyers swoop in and flip a house back to market rate for a free profit (or realistically, hold a bidding war and end up paying close to market rate anyways)
It doesn't make logical sense suggesting a bank has any power to change market rate (whether that's an asset bubble or genuine demand)
Secondly, even if a bank did offer the foreclosed homes much cheaper, it won't fix gentrification, it just means whenever a house gets foreclosed a bunch of cash buyers swoop in and flip a house back to market rate for a free profit (or realistically, hold a bidding war and end up paying close to market rate anyways)
It doesn't make logical sense suggesting a bank has any power to change market rate (whether that's an asset bubble or genuine demand)