A common misconception is that banks use "fractional reserve" lending, in reality private banks create money out of thin air when making loans, constrained only by regulated capitalization requirements (and the obligation to take the write-off on their own balance sheet should the loan default) [1].
Another common misconception is that unregulated banks lead to financial instability and panic. The theoretical and historical evidence for this is pretty weak [2] -- people are much more vigilant with their money when banks are unregulated, and much more aware of the inherent risks of financial systems.
(If all of our regulations worked so well, why are our financial crises worse than ever? cf 2008)
[1] https://www.bankofengland.co.uk/knowledgebank/how-is-money-c... [2] https://www.jstor.org/stable/1814673