TOPIC: Roleplaying oneself in a TD run

From a purely roleplaying point of view, I'm trying to figure out how a real-world skilled person transported to a True Dungeon world would compare to a TD character.

Specifically, I'm a 1st degree black belt in a martial art (Tae Kwon Do) where 1st Dan represents "you've got the basics, now you can start really learning," NOT by any means "Hollywood master of death." As I go through this weekend's Golden Obelisk adventure with sealed-pack Common tokens, if I play Monk would the real me in an equivalent real adventure be doing about the same? Better? Worse?

If someone shoots an arrow at you, can you deflect it?

Excellent question. The answer is ... it depends on flight time.
In Society for Creative Anachronism field combats, ballista bolts fired from the back edge of the battlefield were fun to dodge when I had room to move.
SCA combat archery arrows -- the kind you can fire at people not targets -- are typically shot from 20 pound bows 10 or so yards away and have big blunt tips so they don't go through your face-gill into your eyeball. That makes them safer but slows them down. If I'm watching the archer shoot I can 100% deflect with a shield, 75% deflect with a spear or sword (and thus probably a staff too) in full defense mode.
Against an actual full-poundage arrow shot at that range, I'd be 100% dead in monk mode (i.e., without plate armor & shield).
So the question is: Is the test the close-shot arrow or the long-range shot from dozens of yards away?

A TD monk is meant to be a 4th level 3rd-ish edition DND character with slightly better than average stats even among heroes. This puts them well beyond the realm of what a typical, or even exceptional, human being is capable of.

An average punch landed by such a monk does 5.5 points of damage, more than enough to kill a typical commoner human with a single blow.

They can be pushed off the upper deck of Lucas oil stadium and fall to the field and take no damage.

They can endure 8 blows from a common human trying to kill them wielding a club or baseball bat and expect to survive, or endure being shot with 3 arrows by an archer skilled enough to gain employment as a professional man at arms.

Under 5th edition rules they can make a standing vertical jump of 2.5 feet - which would make them about average for an NBA player.

They can carry 225 pounds.

Assuming 3d6 stat generation, the TD Monk is, relative to the general population:

STR, DEX, and CON: 90th percentile
INT: 75th percentile
WIS: 98th percentile
CHA: 50th percentile

Assuming independence of stats (which D&D does) this would mean around 1 in 400,000 people has attributes this high or higher.

I don't think it would be the skill that necessarily distinguishes a 1st Level adventurer from a 0 level character as much as it is the Fear.
In Dungeon Crawl Classics all characters start as 0 level, straight D6 stats, D4 HP. You are a commoner who has to rise up and defend their village or whatever. Characters die in drives, but whoever survives can become a level one adventurer.
That is probably what separates the adventurer from one who has skills. I won't even go on the second level of our barn in summer because there are wasps, let alone an Evil Outsider or Aberration. Even if I had a firearm, its the Fear and Terror to overcome. Sure everyone thinks they would be the one that stands and fights, but that is before the arrows fly and the army charges.
I think that combat veterans and first responders are at least 1st level. I know I am a 0 level commoner who would go to defend the village, but all bets are off after that.