If there's no proof of which is strongest, then why would anyone start a thread about which one is stronger?
Because topics like that invite discussion and debate, which is exactly why forums like this were created in the first place. Star Trek
isn't real. The events that happen in its universe aren't real (as far as we know given that most of them happen in the future). Yet they're discussed over and over again because they're fun to talk about.
If everything were clear-cut, there would be no point in discussing anything. People like discussing topics that are challenging and force one to reexamine his or her viewpoints.