Diminishing unhappiness is a better goal then increasing everyone's happiness, even though they sound the same they are not.
Like how science works by disproving instead of proving.
What you just said has a Glass half full/Glass half empty perspective. The positive perspective alternative will always achieve a better result for everyone if it is what’s desired.
Fair enough although there is usually a means to create happiness for all. As with the room too cold/too hot situation. Cold gets warmer clothes/hot get cooler clothing. Everyone happy
Glass half empty perspective 😉 It is just as easy to assume that the cold will be grateful for the warmer clothes/heat and the hot will be grateful for the cooler clothing/AC