Because it is gossip. Gossip spreading about bedbugs being in an albergue, without any actual proof they are there, or were ever there. This quote is from the original post:
"bed bugs reportedly from Azofra"
How could anyone know for a fact where the bedbugs, if there were indeed any in the first place, came from Azorfa? They can't know and didn't know. It was idle gossip, but gossip now read by people who come to this forum for information.
Sure, if members want to discuss bedbugs a million times on here, who cares, but when there is gossip spreading that could negatively affect an albergue, that's wrong, or even the various posts that make it seem as though albergues on the Camino are infested with bedbugs. That actually frightens some people and may cause them to change their plans.
Just for the record. I have walked seven Caminos. I never took a single precaution against bedbugs. Have never even thought about it. I have never seen a bedbug on the Camino or met anyone that was bitten. Not saying it does not happen, I have just never seen it or experienced it, and I do not consider that to be luck. More like the threat is exaggerated.