You can no longer gain deep-rooted traumas from failed brain surgery …

…or natural damage. (#3984)

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## About The Pull Request

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## Why It's Good For The Game

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The surgery for curing deep rooted traumas is locked behind RND, which
is basically non-existent these days, effectively making deep rooted
traumas permanent. That honestly doesn't feel great. This makes brain
damage a lot more manageable.

## Changelog

:cl:
balance: You can no longer gain deep-rooted traumas from failed brain
surgery or natural damage.
/:cl:

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code/modules/mob/living/brain/brain_item.dm

@@ -349,14 +349,14 @@
 	return TRUE
 
 //Proc to use when directly adding a trauma to the brain, so extra args can be given
-/obj/item/organ/brain/proc/gain_trauma(datum/brain_trauma/trauma, resilience, ...)
+/obj/item/organ/brain/proc/gain_trauma(datum/brain_trauma/trauma, resilience, natural_gain = FALSE, ...)
 	var/list/arguments = list()
-	if(args.len > 2)
-		arguments = args.Copy(3)
-	. = brain_gain_trauma(trauma, resilience, arguments)
+	if(args.len > 3)
+		arguments = args.Copy(4)
+	. = brain_gain_trauma(trauma, resilience, natural_gain, arguments)
 
 //Direct trauma gaining proc. Necessary to assign a trauma to its brain. Avoid using directly.
-/obj/item/organ/brain/proc/brain_gain_trauma(datum/brain_trauma/trauma, resilience, list/arguments)
+/obj/item/organ/brain/proc/brain_gain_trauma(datum/brain_trauma/trauma, resilience, list/arguments, natural_gain = FALSE)
 	if(!can_gain_trauma(trauma, resilience))
 		return
 
@@ -378,7 +378,10 @@
 	if(owner)
 		actual_trauma.owner = owner
 		actual_trauma.on_gain()
-	if(resilience)
+	if(natural_gain)
+		if(actual_trauma.resilience >= TRAUMA_RESILIENCE_LOBOTOMY)
+			actual_trauma.resilience = TRAUMA_RESILIENCE_SURGERY
+	else if(resilience)
 		actual_trauma.resilience = resilience
 	. = actual_trauma
 	if(owner?.client)
@@ -396,7 +399,7 @@
 		return
 
 	var/trauma_type = pick(possible_traumas)
-	gain_trauma(trauma_type, resilience)
+	gain_trauma(trauma_type, resilience, natural_gain)
 
 //Cure a random trauma of a certain resilience level
 /obj/item/organ/brain/proc/cure_trauma_type(brain_trauma_type = /datum/brain_trauma, resilience = TRAUMA_RESILIENCE_BASIC)

code/modules/surgery/brain_surgery.dm

@@ -55,7 +55,7 @@
 			"<span class='warning'>[user] screws up, causing brain damage!</span>",
 			"<span class='notice'>[user] completes the surgery on [target]'s brain.</span>")
 		target.adjustOrganLoss(ORGAN_SLOT_BRAIN, 60)
-		target.gain_trauma_type(BRAIN_TRAUMA_SEVERE, TRAUMA_RESILIENCE_LOBOTOMY)
+		target.gain_trauma_type(BRAIN_TRAUMA_SEVERE, TRAUMA_RESILIENCE_SURGERY)
 	else
 		user.visible_message("<span class='warning'>[user] suddenly notices that the brain [user.p_they()] [user.p_were()] working on is not there anymore.</span>", "<span class='warning'>You suddenly notice that the brain you were working on is not there anymore.</span>")
 	return FALSE