The tournaments I'm considering, are on a hilly, central Virginia course with a 200 yard walk across a parking lot from 18 to 1. 40% of players probably pause and grab a new water bottle from their trunk. Others refill water bottles from the one spigot. None takes more than 30-45 seconds. Is stopping to top up water allowed? Drying your Disc for 15 seconds each time before putting it back? It isn't a military operation.
As a TD, I'd laugh at that sort of complaint. Especially if, in this case, you are walking past the cars, it is in a part of the course that flows pretty well and is right after two of the slower holes so no one will be pushing you.
Now if they stop at a flymart, fondle 7 discs then get in line, sure... but walking 50' out of your way, popping the trunk and grabbing a backup, doesn't require "hustle" in my mind.