There not being enough evidence to convict the person you're accusing is on a different planet from there being evidence of you filing a false report.
In theory or in practice?
If you have a legitimate complaint against a person for any crime there is simply no reason to fear being charged for filing a false report.
'If you have nothing to fear, you have nothing to hide.'
Your faith in the criminal justice system is something else. Are you white?
Sincerely, a person who was raped who didn't report it in fear of a great many things, without an idea as dumb as being afraid of being convicted for filing a false report ever crossing my mind.
So, your conclusion is actually rooted in your personal feelings about your own rape and fear?