It's legal defense in depth, similar to not talking to police without an attorney present. All it takes is an overzealous prosecutor or social worker to ruin so

It's legal defense in depth, similar to not talking to police without an attorney present. All it takes is an overzealous prosecutor or social worker to ruin someone's life by misrepresenting some random circumstantial facts. This happens all the time in drug cases, for example, where the possession of innocuous items like small baggies allows prosecutors to take charges from regular possession to intent to distribute or trafficking. Even if someone isn't doing anything illegal, since >90% of cases end in plea deals it's good legal hygiene.