How many climate predictions have been correct? How many predictions in general have, a posteriori been right? This is multivariate, not necessarily a question of the effects of climate itself, but every conceivable effect in a long chain, including further human intervention and non-linearities in global climate behavior that are yet-to-be observed and no doubt a lengthy slew of other factors. But we're not allowed to talk about speculation, right?

This is simply not accurate. There might be certain areas that are more impacted than others, like the Maldives, but there is no reasonable interpretation of "uninhabitable" any scientist would attribute to Africa, let alone Earth entirely.

"places" uninhabitable is not the same as the planet being uninhabitable, as the parent post claimed. Parts of the planet have been uninhabitable for ages.