My view has nothing to do with if the foul is minor or petty. It has very much to do with what the law intended us to do here.
When the triple punishment was removed they didn't want anyone to wrongly take advantage of it by deliberately fouling, take a yellow and take a chance that pen is not scored. So they left the red card for those type of offences so the law is not misused
Why they chose the wording that is there now, God knows. It is not showing that exact intent and this case exposes that flaw. I suspect they didn't want to use the words "deliberate foul" because that would have opened a much bigger can of worms.
I think
@alexgr hit the nail on the head pointing out the poor wording. Let's not get bugged down to the exact letter of the law here and look deeper into why the law was changed to downgrade a red.