It would be a terrible thing to go through. But remember, a child is an individual, who may not share issues they are going through and may not show easily identifiable signs. And even if they do, a well-meaning and good parent may make mistakes and not properly address those issues, not out of malice or negligence but an ignorance that they arent qualified to identify or address themselves.  A good parent may not know that their child is being bullied at school or the true extent of the bullying etc. or may not realize what content their child is consuming online. Should parents monitor 100% of said content? Maybe, thats debatable, but even if so should it be a criminal offense to miss something? As humans its easy to want there to be easily identifiable root causes to these issues that we can be confident that if we take the right steps, they could be prevented 100% of the time. But thats just not how human beings work. How one person/child copes with trauma will differ from one another, and how much trauma one can withstand will differ, and the signs will differ, and the solutions will differ. Parents can do a lot and they have a responsibility to do a lot, but there isnt going to be an end-all be-all math equation thats going to tell you how to 100% surefire prevent another person from committing a tragedy against themselves or others.