Yes, some people are only happy when their opinion is taken for granted.
You know Frank, Palmfish here is quite right and he or she is not the only person here having a problem with that so what makes you think otherwise? Quoted specifications of the PA system are there to show how specifications should be published. I suppose you never read engineering specifications for an audio product but I assure you, they are quite detailed and it is what consumers (by definition: "the people that buy" meaning not only enthusiasts like you but also professionals) expect. So yes, the lack of information is a problem and I don't see how this can be misunderstood as an off-topic subject.