There are a lot of expenses in life that are frivolous. For me, the point isn't to drive them to zero, but to drive them below a point where they matter and then enjoy life.
$100 bottle of wine, $50 steak, $100 in fireworks, $500+ upgrade to business class on a special trip, all fall into the category of "unnecessary and wasteful" spending, yet I don't want to eliminate them entirely.