The question is, what caused the second GA to deteriorate into a crash?
The investigative boards are not required to answer questions "why?" (as far as human performance is concerned), instead they want to answer questions "what happened?". If there are some contributing factors (poor training, inadequate rest, etc.) they will mention it but rarely a cause-effect connection can be established.
It is a known thing in aviation - a second attempt at landing at the same airport (due to marginal weather) has very poor odds at succeeding at least as far as General Aviation is concerned. Pilots are strongly encouraged to go somewhere else.