Why very high white balance temperature for some cameras?

Here is a sample at “only” 30856K, tint 0.970. By comparison, in a trial version of Silkypix Developer 8, the camera setting is given as 4998K, tint 3 magenta. The shot has blown sky (deliberately allowed), but other shots with no blown pixels may still come out at tens of thousands degrees Kelvin. Sometimes RT Auto white balance computes a more typical value, sometimes it too says tens of thousands degrees.

leaves_temp_example.DNG (42.3 MB)