I remain to be convinced of the veracity of this. I used to use a lot of those illustrations as icebreakers when I ran training courses. From memory, a 50/50 split was quite normal, which I wouldn't expect if they could foretell personalities.

Came across this earlier, it's quite interesting: https://trendscatchers.co.uk/index.php/en/2022/08/11/the-things-you-see-in-these-optical-illusions-reveal-your-inner-truth-2/