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.
Real rates were negative for 10+ years (and still are on the short end!). That's everyone paying for trillions of dollars of wars, speculation and bad investments. The bill has to be paid.
But as mentioned, none of this applies to intermediaries like banks. They aren't forced to take on any risk.
They sure were, and fortunately humanity took that free money and invested it in sustainable energy technology so that at least we got a bunch of infrastructure out of it.
Oh actually wait we just had austerity for some reason.
That money isn’t doing anything to cover those expenses if some of it isn’t “working” to produce returns.
Individual investors don't even have that option and also have inflation to deal with. Banks don't.