why do you think people see faces in everything ?  

https://static.boredpanda.com/blog/wp-content/uuuploads/things-with-faces/things-with-faces-27.jpg
https://www.iwastesomuchtime.com/wp-content/uploads-webpc/uploads/sites/68/2023/02/Faces-Memes-1-94490.png.webp

because your brain automatically discards 99% of all information and only the 1% it deems relevant reaches your consciousness.  

faces are deemed relevant.  other things not.

you don't actually see 99% of what's in front of your eyes and a lot of what you do see ( like these faces ) isn't actually there.

you may not call this an algorithm but it is certainly a filter and not very different from what Twitter uses to assemble your timeline.