Dave doesn't want your pity. He isn't any weaker or any less just because he can't talk. He continues to write, although he takes a little more time to write so it's eligible.

'it isnt that bad
i mean conversation is a bitch obviously but its not like i have any fucking problems with it
life is gonna be difficult anyways
if people really want to get to know me theyll put the effort in so if they dont
it means one less dumb fuck to deal with'