The proper meaning of flee is simply "run away" you may run away from anything or anyone
whether it is situation, area, person, something etc the word does not restrict from being used to refer persons read that screenshot especially example number 2.
About how I review the whole story of redeemer I find out that phrase was within group of other words he did not start as fresh with "how level of ignorance" from the first place also how could be used without question mark at the end example like saying "how low life" like expressing how low life a certain entity is.
"how wonderful" amazed by certain situation
"how creepy" etc
But online conversion most of the time is not formal conversation which makes it not must to question about following of some tiny grammatical rules since someone may be writing just informally as long as the primary meaning is active.