Your opinion notwistanding, it seems it remains outnumbered on the cool factor.
Maybe there isn't any point in having weapons on a scoutship (nevermind that it's nice having it return intact to relay its findings), but that doesn't change the fact that it may, neither your logic or opinion will change any of the canon details.
Consdering the engines on the back of that thing, I'm willing to bet it's quite a bit faster than the Blackbird.
As for what the Colonials thought they were going to find, I also would have been suspicious of an enemy that had completely upped and disappeared after signing a treaty. Turns out they were right in their suspicions, the Cylon fleet that was amassed in that time was nothing short of considerable and can hardly be misconstrued as a defense force, no question it was for attack.
Beyond that, as we learn in Razor, William Adama discovered the experimentation that the Cylons were doing on humans in creating hybrids, I would think this also worthy of investigation, should there be any Cylon force hanging around the border in the hopes of capturing more vessels.
Bottom line, there was more than enough reason for suspicion, hence that mission.