I don't see this as fixing the issue. Maybe clubs need to spend time training front rowers. If you go 4th grade up, then what happens if the 4th grade props get injured? The rule was put in place because a number of clubs use uncontested scrums as a tactic when they dont have a strong front row. This issue has been getting worse over the years to the point that you watch multiple grand finals with uncontested scrums. It is not rugby. It is part of the game. Scrummaging is a genuine skill that requires training. Just like tackling. I understand the safety concern but that comes down to training and commitment.
I agree with you. I was screaming out "uncontested scrums" from the 8th minute of the game (jokes); nobody listened!