With suicide being illegal in most jurisdictions, not everyone interviewed may have been honest in relating their feelings. If you have suicidal ideations, telling others about them can have severely negative consequences. Saying “I wish it had worked” would likely create ongoing jeopardy.
No, it isn’t. People who have attempted suicide are often very closely monitored by family/caregivers/medical professionals for whether they are going to attempt again, for years, and can be subject to significant constraints if they give any indications that they are thinking that way.
Sure, but the comment of was about the illegality of suicide and the resulting jeopardy causing people who attempted suicide to say they didn't wish it had worked on a documentary about suicide (and presumably skewing the "stats").
I don't think that's the same as what you're describing.
I'm sorry but this feels kind of specious.
Especially if the person has already admitted to trying to commit suicide (which they presumably did considering the context from parent comment).