Let me put a blanket statement out there.
"Everybody from the unexperienced to the expert shooter can benefit from more practice and training."
I don't think anyone would disagree with this.
What many of us are questioning is the necessity of mandated training.
There are countless examples (real and hypothetical) that we can all come up with where people are under trained or negligent. Many times we have even witnessed it. Many times these people we have seen or heard about have received the mandated training or even more. I don't think these specific examples proves one way or the other that training should be mandated. It's a much bigger question than any one example.
I'd agree with that, and I even gave it a like

For me, any training requirement, voluntary or mandatory, should not be piggybacked onto the 2A.