The situation is 100% artificially created.EDIT:
The situation wasn't artificially created, it never changed, there were 2 outs no matter what the umpire said, just as there was only $100 in the bank, not $1000, no matter what the bank said.
Why did the defense leave the field? Because the Ump created a situation where they believed there were three outs.
Why didn't the defense try to retire her? Because the Ump created a situation where they believed there were three outs.
Why did the runner get the opportunity to run without a defender covering the base or making a throw? Because the Ump created a situation where they believed there were three outs.
Had the Umpire not created an artificial 3rd out nothing else happens.
When dealing with stupid time-limit games pay attention to how many time umpires say, "That's three hustle off."