Sorry my friend, that's wrong. What do you think how banks earn money?
Discussion
Commercial banks earn money in a variety of ways:
1. private loan interest
2. mortgage interest
3. account maintenance fees
4. transaction fees
5. loan origination fees
6. holding securities
7. proprietary trading
8. wealth mgmt and advisory services
9. credit card interest
10. forex trading
11. underwriting services
12. investment banking (mergers and acquisition advisory, capital raising, market making
13. Loan securitization
14. mutual fund fees
15. etf trading fees
16. insurance products
17. safe deposit boxes
18. federal funds lending
19. holding government treasuries which provide a yield.
Those are some off the top of my head.
if you study the space you'll find that many banks do not want to fractionally reserve but they are, again, forced to by US banking regulations.
I'm guessing you don't really know as much about commercial banks as you think. But if you dig into it you'll find that the way banks operate, in a predatory and hostile way, is caused primarily by the draconian regulations they are forced to follow to maintain their licensing.
But you know, that banks can create money out of thin air and the fractional reserve is just a small part of that, they need as equity capital?