A minor brain inconvenience

So, im a rimworld newcomer, (abt150/200hrs)

Some exposition: i have 10 pawns, 7 of them are able to fight, and all of them equiped with phoenix armor with catafractarian helmets (a normal quality or higher), one of the my fighters witch called Slag she got an Exellent q cata-helmet, it is the best helmet i got

Day 394of my routine colony life, and suddenly.. RAID!

So, ive killed the raiders, some of them run for their lives, i was watching my colony works, and Slag was moving suspiciously slow, ive checked the health menu and she got brain scar (6/10), so i send her to swim into a biosculptor for 8 days (transhumanism buff), while she was regenerating i got one more raid (scaria infected gorillas), no one of my colonists get a new scar or some permanent damage even after a melee fight.

Well 8 days left, she walked off a biosculptor to kitchen (she's a cook)... A few days were nice, no red events at all. But everything good early or sooner ends... INTRUDER ALERT, MECHASLUTS CLUSTER IN OUR BASE!

Than was a fight, i won without any loses (2 centurions and a few minigun centipedes btw), but.. Slag: brain scar (7/10) of energy blaster! Great! Biosculptor, 8 days left, ive take a quest from empire to destroy some pigheads village, ive send four of my space marines in capsules to destroy em (Slag was included to a punitive squad), i won, BUT Slag: brain scar (8/10) of automatic pistol, can you imagine my face at that moment? Probably you are right whatever you've imagined.

3 days later after "great" annihilating pigheads village my pawns came home, Slug was sent to a biosculptor, food was enough to survive about 15 days for my colony, so right after one more fckng cycle of regeneration i thought she will go to kitchen and make some awesome dishes. 8.1 days of colony routine were finally gone, she went off a fckn biosculptor so what do you thing a Randy-brandy will do? After 4 days of her awakening a pighead Raid, i won almost without any serious loses, raiders just destroyed some plasteel walls and one sofa before i kicked their asses out of my bunker, but... Slag: brain scar (7/10) shotgun

How? How does this works? Idk much about the storytellers, but it seems like a Randy chooses my best shooter to kill no matter what. I play an adventurer story difficulty mode. Ive survived a lot of raids, a lot of my pawns dyed in other stories but no one of my pawns didn't have that much brain issues in a row, why Slag always got a brain scars? There is no any other parts of her head? No teeth? jaw? Eyes? Or my favourite nose that is usually ripped off more often than i see a sun? Does pawns got a head every part of it made of brain? She got 1 point of smart, her brain is smooth af, it will reflect even a neutrino, how the material things can even damage it?

I just remembered she also got an armoring gland, so i cant understand twice how tf anything can penetrate a double layer of armor and damage nothing, except brain

Bruh, im sorry for you watched that post, i just get kinda bit a little angry of that, have a nice game, and dont let your pawns eat without a table