Earlier quoted context omitted.
its almost like making bets with money you don't actually have yet is a bad idea
This is literally the definition of fractional reserve banking, used by almost every bank worldwide.
As a consumer (or a business client in the case of SVB), how does it benefit you that the bank doesn't simply hold your deposits in a figurative safe somewhere?
At a minimum, I wish I could say it benefits us by banking being free.
Lending could be opt-in. There could exist banks who charge a premium for simply being the custodian of your money. (These must already exist)
Fractional reserve makes money easily available to those seeking money they don't have, at the risk of depositors whose money they're putting on the line.
(For better or worse. I'm not for or against it. I'm certain there are massive benefits to the system. But the reality is the average depositor probably doesn't realize their bank deposits aren't actually theirs - and that's why we have the FDIC)