Some people's obsession with saving time is odd to me. I'm a fairly quick player and I prefer a fast pace to a round, but I see no reason to prioritize saving time over all else in a tournament. Disc golf isn't a race. The round's going to end when it's going to end. Especially in a shotgun start environment, you can only go as fast as the group in front of you. If you're keeping up with them, then the notion of "saving time" is entirely unnecessary.
The time-saving provisional rule is there as a convenience option, not a requirement.
This is on spot. In addition, the round is going to end with the arrival of the last and slowest group. Getting back to tournament central first does not win anything.....except a longer wait for the second round or awards.