This is a common masochistic sabotage that I describe with the acronym "dexify." When individuals defend, explain, or justify, they are unnecessarily supporting the reasons for their decision and giving others the opportunity to rebut their rationale.
Source: wiktionary
Powerful people don't dexify (defend, explain, or justify).
Source: wiktionary
The reason for this is that when you ask "why" questions people feel defensive and have a tendency to "dexify" (defend, explain, justify) what they said.
Source: wiktionary
We may “dexify” — try to defend, explain and justify — so that the angry person will stop being angry with us.
Source: wiktionary