That isn't true. All that shows is that a particular sequence of evolutionary steps can occur, it does nothing to falsify ID for any other case. The theory, or all its subtheories if it is a complex theory, needs to be generally falsifiable.
Contrary to your example, ID and Evolution are not mutually exclusive so proving one does not falsify the other.
Your falsification criterion does not address the potential for a designer to have produced a design that appears evolved.
"Saying that is too much work or will take too long is avoiding the issue. If the hypothesis is not falsifiable, then perhaps the production of flagella by evolution is an article of faith.
Again, the potential falsifiability of ID says nothing about the falsifiability, or the validity, of the SToE.
We cannot falsify ID because there are no criteria for its falsifiability, not because Evolution is incorrect. They aren't linked at this level.
Placemarker