“It is what it is.”
I prefer to take the Perspective of:
“It was what it was.”
For, in actuality, the only thing that ever Is belongs to the Present.
It's interesting to note that people are generally Unaware of the language they use and not Aware of the Negative impact of non-supportive dialogue.
The sooner we Listen to what we are saying, the sooner we can see our Conditioning that only serves to keep us Small and Inconsequential.