> Glassware looks shiny from a dishwasher.
It most certainly does not in any dishwasher I've ever interacted with. Glassware is one of those things that I can very easily get cleaner than a dishwasher.
Maybe glassware is just easier to evaluate whether it's clean or not?
But just like looking clean doesn't mean being sterile, sometimes you can have benign residue such as mineral deposition which are not dirty per se.