No, its just the logical extention of "Flavor is mallable".
Why do you say that when the flavor and rules conflict to change the flavor?
That is actually not a logical extension because what I said in essence needed no extension.
What you are saying with your extension is that you are willing to purposely ruin your own immersion in the game world as well as the enjoyment of others that are playing with you by extending the "flavor text" into ridiculous territory, or to non-existence. Both of which are extremes.
Thankfully the game is usually played in the "middle of the road" not in the extremes that you seem to want to believe it is played.
Your answer to "Insulting a skeletton doesn't make sense" is "Well change the flavor then". Why not change the rules instead?
What benefit would changing the rules provide? Then we'd be back to a place where I would need a rule change for every corner case that ever existed. There is a reason that D&D is played with a DM. So that those type of corner cases can be adjudicated if necessary.
By refusing to do that, or even accept it as possible solution, you are saying that flavor are less important, matter less, than rules.
Never did I say that, and once again you're operating in the extremes. Why would having malleable flavor text imply that it is less important than rules?
The fact that "flavor text" is malleable is what makes it important. Because it provides a starting point for the narration that can make sense at the table, but because of its malleability I can extend it to cover those corner cases that rules seem too inadequate to handle.
If someone at my table wanted to operate on the ludicrous fringes of narration they would be able to do so with or without flavor text, or rules. The fact that there is a DM and other players at the table is what limits that kind of behavior, not more rules for the game.