Just show such doubters a random Linus kernel announcement mail and
they'll soon grasp that whimsy and humour in release announcements is an
l-k tradition.
(Anyone who equates reliability with 'professionalism' and professionalism
with lack of a sense of humour is someone I don't want to go anywhere
near, although I'm aware that entirely too many such odious little
small-minded incompetent prigs do exist.)