Nothing you wrote invalidate the point he makes about admin UX. Internal pages may not need to be fancy, but realizing that expectations change over time and th

Nothing you wrote invalidate the point he makes about admin UX. Internal pages may not need to be fancy, but realizing that expectations change over time and that it may be a good idea to polish the UX a little isn't something that should be ignored by saying that only internal people will use it. If the claim had been about ugliness, then you may have had a point, but it was not, it was about UX.