They probably do, but my guess is they still fear the pain.
If you think about the Crucible from a lore perspective all that repeated death within such a short amount of time seems kind of gnarly.
I guess folks can get used to anything if they experience it enough times.
						
					
					
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	Thats the point of the crucible, its to make Guardians [i]not[/i] fear death.
 
										 
					 
		    