Hi David. I was making no attempts at "enlightenment" here, just merely responding to your question.
There is a reason that i use the word "tourist" in quotation marks. It is not a word i like using simply because it carries a lot of preconceived ideas with it. I don't mean it as a gauge for quality levels. I am just trying to point out that from a cultural perspective this type of dress is not what a Balinese man would general use for his personal keris. I would be interested to know more of the history of this sheath form if anybody knows it, whether it was developed just for the tourist trade or if there is some credence to the idea that they may have been used in traditional theater.
Again, the blade itself is certainly not of "tourist" quality. As for hilts though i would have to say that this is a fairly low level of carving for this particular hilt form. I have often seen old blades like this turn up in this style dress. I have always just figured that someone used what was cheap and available so that they could market the keris without to much of an investment involved. I have a nice one in a variation of this sheath form. It too is a decent carving like yours and the keris fits it perfectly so i kept it and just replaced the hilt with something nicer.