Why do people slit their wrists?

like i mean i know they do it for suicide,
but...

correct me if im wrong
but

won't you be in pain for the next 30 minutes to an hour?
waiting to bleed out?

i mean you won't just sit there and wait to die you will feel all of that...
until you bleed out i mean if you want to kill yourself why do this?

thats 30 minutes of hell...
(thats a cool band name)

but i dont get it
correct me if im wrong I don't know if its really like this i just assume it is
Why do people slit their wrists?
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