This is no different to me having a email dedicated to searching for a house to give to real estate agents and someone saying “I don’t think it’s legal that a house has an email”. It was frustrating reading up until your comment that people just didn’t get it.

https://www.theverge.com/2022/8/21/23315513/google-photos-csam-scanning-account-deletion-investigation

Google looks. Google reports. Even if you did nothing wrong you’re guilty until you prove innocent and even then you’ll never get your account back.