It is absolutely not true that men's lives are ruined because of rape allegations. It is a complete myth.
Complete and utterly unsubstantiable rubbish.
When any extremely serious crime is involved, the effects on the lives of the victims of that category of crime are obviously devastating, and can prove ruinous.
When the victim is not actually taken seriously, or even accused of being a liar or a fantasist, and the offender is not prosecuted and/or convicted, the devastation is still worse - and they (the victim) will frequently be 'punished', spurned and distrusted for years afterwards for having allegedly 'lied' about such a serious crime ("I wouldn't risk going anyway near her, mate - she's nothing but trouble, that one.")
Therefore, why on earth would you think that innocent men who are wrongly accused of the same crime would not suffer for it in any way?
Many people would remain ever suspicious of him and you get the ubiquitous hard-of-thinking 'there's no smoke without fire' brigade who automatically assume that he must have been guilty. Marriages, relationships, reputations, careers etc. can be destroyed in the aftermath of a fabricated rape allegation.
Rape is an absolutely evil crime and there are a great many wicked men out there who, outrageously, completely get away with it - but that doesn't mean we should infantilise all women by suggesting that being female renders you entirely incapable of ever doing terrible, evil things; whilst supposing that it's such common, everyday behaviour to be expected from all men ('boys will be boys' and all that) that good men and their loved ones and associates, of both sexes, wouldn't be devastated long-term by their having being accused of it.