Sure that’s one of the argument for why they do it but the money doesn’t directly to most small businesses, we do have small downturns, and they don’t result in the majority of small businesses going out of business.
look up the history of why the fed exists and you’ll see why we have ‘small’ downturns.
Most small businesses fail because they were never serious businesses to begin with. A business closing down after running for a year with no profit isn’t relevant.