It is not something that can be trusted since it must be taken with a grain of salt, so best to ignore it.
Ah, I see. Let me ask, is English your first language? (I'm legitimately asking, not being snarky) Because that's not how "take with a grain salt" is typically used. Normally, it's used to say that a particular fact isn't completely reliable, but it might be. If a fact is completely wrong, it would be deceiving to use "take it with a grain of salt", because the phrase is usually used to indicate that it might actually be correct.
In my opinion, when speculating on the board, when people use that statement, particularly devs, their intention is often to say, "just don't get upset with us later if your assumptions turn out to not be true". It doesn't mean, "don't use this evidence at all".