So you’re wanting to “unoprotect the field to keep spectators happy. In the NFL if every “non call” that was caught on camera had to be reviewed to satisfy the spectators you’d play the first half one day and the second half the next day.

See rule attached

Apple and oranges. In golf, players are responsible for enforcing the rules and assessing a penalty on themselves. In football, the players are not responsible for enforcing any rules. The officials are charged with watching the game and enforcing the rules.

Then why was there a penalty? Apparently, the video is the only evidence.

Shane Lowry agreed to assess himself the penalty so as not to ever be called a cheat. I'll bet in his heart he knows he didn't do anything wrong.

Really? If the video is not admissible evidence, then why was it shown to the officials?

The new rule limits the use of a video, but they do not prohibit it:

"New Decision 34-3/10 implements two standards for Rules committees to limit the use of video: 1) when video reveals evidence that could not reasonably be seen with the “naked eye,” and 2) when players use their “reasonable judgment” to determine a specific location when applying the Rules."

I think the the first exception would apply to this situation because the player could not see the ball when taking a practice swing. My opinion.