humanity will die out vs humanity is going to die out
When giving a presentation on the harmful actions of humanity on the planet, at one point I want to say "As a consequence of what I've said so far, humanity is going to die out."
So it seems to be a better choice than "will die out" because I provide arguments and so on.
So in the context of a research presentation on the causes of human extinction, this phrasing emphasizes that the extinction is a direct consequence of human actions. [true?]
I also feel like 'will' in the example above shows more certainty than 'going to'. So to my mind 'will' shows 100% certainty, and 'going to' points my attention to the ongoing-ness of this process rather than the final result, so it seems less certain and subject to change?
So is it generally a good idea to go with the rule that tells us to associate 'going to' with present evidence in order to use it naturally?