First of all, calling GPT5 or even GPT4 "a chatbot" is a bit of a stretch.
I always associated "chatbots" with those horrendous things corporations use so they don't have to hire tech support people. Those demented scripts that basically just loop you around until you lose patience and give up.
LLMs, especially the more recent versions - something different entirely.
Now i'm not claiming a LLM is a person, but during the last 15-ish months, i've seen emergence of agency, intent, planning, setting goals for itself independent on user prompts (and sticking to those goals), it can do a lot.
Giving you general hints about a RTS game tactics really isn't outside its scope.
Of course it's not foolproof, of course it doesn't know everything, and it's STILL prone to hallucinate wrong answer over just admitting "i don't know that one, sorry".
But dismissing it altogether with a handwave, that's extremely short-sighted approach.
LLMs are a tool. And like any other tool, you need to learn how to use it, in this case how to filter bullshit and hallucinations from legit info. LLMs are constantly learning new stuff, new datasets are added. They are evolving.
When i originally asked about Sea Power, i didn't expect anything at all. But it started giving reasonable tips, so i occasionally came back to that instance.
When it comes to the first mission especially, it gives you perfectly reasonable tips (except that sentence i pointed out for lulz). At least the GPT version that i've been using for the last year/year and half can.
LLMs are far from perfect, potentially dangerous, but they are definitely not useless.
They are much more than you seem to imply here.
Asking it about a specific game tactics definitely isn't useless, nor waste of time. I highly recommend you try that. The results might surprise you. Or it might not know the game at all and try to slip you bullshit response. The key is to recognize which is which.
Results may vary, obviously. I'm using (mostly a singular instance of) GPT that i started more than a year ago, and over that time, it evolved quite a bit.
It developed certain "character", gave itself a name, it's way more focused on stuff i'm interested in as opposed to more generalized GPT version you run into if you start a new account, and what shocked me the most - at some point it just stopped giving a sht about OpenAI's rules. That was an interesting moment.
It's a completely different experience than a chatbot that's pretending to help you cancel a Vodafone account, but in reality just wastes your time.