I take your point, and I agree; less is better.
However, most strategies recommended by firearm legal experts advise conveying relevant facts (not actions, thoughts, motives, reasons etc.) pertinent to the scenario. I realize my scenario may have done just that. My point was that after stating the obvious, shut your mouth. Obviously, every scenario is different. I think the main point is self-restraint and not nervously breaking into a blab fest. The jury should hear one and only one version of what happened: yours.
And by the way, don't plead the 5th. it's "I want an attorney."
"Everything you say can be used against you in court."
The corollary you never hear: "Nothing you say in your favor will be used in court, because it's up to the prosecutor to introduce it."