If you have a team that has a lot of stage jitters, I think putting them in front of a crowd when there's no pressure to place can be helpful. But to do it repeatedly just to brag about 1st place, no.
Of course sometimes there are divisions (mini2,youth3) that tend to have less competition. We've been to plenty of competitions where some teams have lots of competitions and others are alone. You can't always help it.
But still, it's a huge pet peeve of mine to see posts of kids in championship jackets proclaiming to be "national champions" just because they went to a "national" competition and were alone in their division.