you have a limit of attachments for each posts, and some hacks requires a load of attached screenshots... so having the firstpost just make possible to add even more screenshots..
you are weird too, booho...
True, but how many authors actually use the first post for that? You can come up with reasons to use the first post all day long but until everyone starts using it for those reasons, it is just another wasted post.
And being weird does have it's advantages. It repels undesirables.