No need to quibble over the precise level of distraction. Maybe less than Leia being blonde and more than her brunette hair being slightly darker. I still don’t see the validity of the reason for the aesthetic choice that is noticeable.
They probably figured most people wouldn’t care, which is almost certainly true.
As the creature designer said: “I remember saying to Rian [Johnson] that if we were going to do it, we couldn’t make him too much of a ghost because it would deny everybody the joy of seeing him solid and real.”
Sounds like they thought people would care. If you mean they thought most people would like it or at least not be bothered by it, that is clear. If most people didn’t care, as you suggest, then it wasn’t a terribly successful choice. A lot of things in the movie are like that. This was quite a minor thing.
