Do you honestly believe that the pics that are hashed are of babies taking baths?? Or any other seemingly "innocent" photo like that?Until:
A POS you have as a friend on a social media site downloads the picture you posted of your kid in the bath. He/she then includes that in a batch of CSAM photos he/she trades online for other CSAM images. Your photo hash gets collected and distributed by NCMEC. Now, you have CSAM material on your phone.
or
Someone wanting to harm you does the same and posts your photo on a CSAM forum, knowing it will be distributed and the hash will be logged.
I don't even want to imagine what the hashed pics are and have the utmost respect for the people that choose to do this type of work to stop people spreading these types of pics.