https://plato.stanford.edu/entries/chinese-room/
The idea that "human-like" behaviour will lead to self-awareness is both unproven (it can't be proven until it happens) and impossible to disprove (like Russell's teapot).Yet, one common assumption of many people running these companies or investing in them, or of some developers investing their time in these technologies, is precisely that some sort of explosion of superintelligence is likely, or even inevitable.
It surely is possible, but stretching that to likely seems a bit much if you really think how imperfectly we understand things like consciousness and the mind.
Of course there are people who have essentially religious reactions to the notion that there may be limits to certain domains of knowledge. Nonetheless, I think that's the reality we're faced with here.