I understand perfectly, you have absolutely no grasp of basic economics.
Are you seriously comparing banks to hospital?
Banks facilitate the transfer of capital from those that have it to those that need it.
The bank pays interest to those who deposit money, and charges those who borrow it. It takes the difference in interest received from the interest paid and applies it to overheads, what's left goes to shareholders.
If a bank didn't charge interest for the money it leant out it wouldn't be able to pay interest to it's depositors and investors.
Depositors and investors would therefore not put their money into the bank and it would have no money to lend.
Banks exist because there is a demand for financing, that demand is met by a supply from depositors and investors.
Hospitals that don't make a profit are normally part of state health care, the bill is paid by the taxpayer. This works (and indeed some studies show it provides better outcomes to private healthcare) because demand is not subject to market forces (Generally people don't want to get sick more often because medical treatment is free), and the state is able to facilitate supply at a cost of higher taxes.
sigh..... stop thinking about "investors" and interest and whatnot.
(btw people will keep money in banks because its safer, but this is besides the point really)
Think of the bitcoin system.
Did anyone get interest on their bitcoins? did anyone pay banking fee's? any transfer costs from person to person? was there any operational costs?
If some sort of similar concept was adopted by governments, there would be no banks taking in billions from the public. there would be no money printing.
People could transfer money with cellphones, or by entering pins into payment points (maybe even fingerprint?)
nobody could steal anymore...anywhere.
yes, everybody would be a walking atm because they could litteraly transfer any amount of money to any account...correct? but, if a person is held up by a mugger, and money is stolen, he could go to the police and report the last transaction was a robbery, and they could see exactly which account (and who) it was.
similarly, if a person was robbed and murdered, police could check his last few transactions to see for anything suspicious (like large amounts of money being transferred)
no cash.
this also means is a person was caught buying a stolen car/illegal drugs/etc, they could easily track the people down who was selling it.
a lot of crime can be curbed in a system like this.
people wouldn't make money from money itself just sitting in a vault, and the 90% who borrow don't need to pay huge fees for borrowing money.
money is just a value on a computer you know, they don't really have every single note in existence.
I understand some people cannot get this idea around their heads, because in today's system, it does make sense.
the fact is the system doesn't need to be this way. the banks (and gov) just prefer it.