Earlier quoted context omitted.
At first glance, bank balance sheets are unintuitive and feel 'the wrong way round'. When someone deposits $1m at a bank, the bank doesn't have $1m more assets, it has $1m more liabilities. (Yes, this is a gross over-simplification)
Too much money is only a problem if you are greedy for returns, like all the investors who lost money when yields were unsustainably low the last few years. They could have deposited it with the Fed and have been totally fine. Individual investors don't even have that option and also have inflation to deal with. Banks don't.
It’s not that people are greedily chasing returns, it’s that they don’t want to lose significant chunks of their capital due to loss of value.