This is a variant of the
Homunculus Argument. You are attempting to define the rules of engagement using abstract examples and specifics that don't actually exist.
This is the federal Use of Force model that is in use when Byrd shot Babbitt. He was required to follow it as all federal law enforcement officers were.
Babbitt was somewhere between green and yellow (resistant) on that scale. Byrd's correct action was to move into the hallway, be visible to Babbitt and issue clear commands to her. He did none of that. Babbitt wasn't assaulting or about to assault anyone and there was no one present that she represented an immediate threat to. There were other police officers visible to him next to Babbitt or very close to her.
Byrd failed to follow his training--not the first time either--and shot her illegally. Because of the optics of Jan 6, the Capitol Police in collusion with their Democrat bosses conspired to sweep the matter under the rug. I get that.
None of that exonerates Babbitt. What she was doing was wrong. But she shouldn't have died for it. Byrd was, and is, a fuck up as a police officer.