It would be an unusual coincidence when Auto White Balance is "correct". Auto WB has no clue what the light color is, or what color the subjects should be. Auto WB is merely lazy, an easy click, but not actually concerned about correct.
I don't think this is an example of White Balance though. There was something else "auto" included with it. This Gimp result didn't really change WB, it just made everything much brighter and vivid, which can make everything more pleasing. The greens are brighter, the blues are brighter, the pinks are brighter (closer to white), and the whites and reds are brighter. Your picture is not particularly clipped at the bright end, but the Gimp result is. And more exposure would start clipping, which is a common problem in Daylight pictures with lots of red.
There are easy WB solutions, like including a known neutral colored white balance card in a first test shot, so that software WB tools can correct it to actually be neutral again, removing whatever color tint was there before. This only corrects WB, it does not correct exposure.
White Balance Temperature (degrees K) shifts blue and yellow in opposite directions. But your change did not go in opposite directions. Incandescent WB moves blue higher and yellow lower. Daylight WB moves yellow higher and blue lower (red and green are components of yellow, which moving it higher does tend to clip them).
We can instead increase brightness with gamma (the Histogram Levels center slider), which can brighten pleasantly, but does NOT risk clipping.