I never said don’t report it. If the guy has done it once he will probably do it again and sexual abuse thrives on secrecy.
Even if you did get charged, which is unlikely, it is worth it to protect your kids and other kids. If I knew there was a 1% chance I’d be falsely accused of manufacturing child porn for turning over evidence of my children being abused would I still tell the police about what was happening? Yes. But that doesn’t change the fact that an overeager prosecutor can ruin an innocent person’s life and that they should do everything they can to protect themselves from that.