Glass half-empty is optimistic since it signifies that it's not fully empty. Half full on the other hand only reminds of the fact that it's not full, amirite?

The phrase is meant to be interpreted differently than this...

Is the glass half empty, or half full.

Half empty means you only see the downside. Half full on the other hand is a positive out look that things are good, and you still have hope.

My glass is broke

And the engineer says the glass is bigger than it needs to be.

People who spend time deciphering which answer means the most worry me.

Third interpretation is that the glass is two times the size required.

This is why it's a great analogy lol

Your reframe is made of — er, glass