You didn’t watch the vid DID YOU??
go watch the vid, wise guy, then revise your statement.
Not before that statment, but I won't revise the statement. Just because that particular mother used a different technique, essentially that stone has low thermal conductivity, but a high heat capacity, doesn't mean that other mothers, perhaps in different villages don't insulate their hands in other ways. A latter post provides a quote indicating some women do use towels to protect their hands, from a stone that has been heated in boiling water. (That probably wont' burn anyone though, but it ain't going to be comfortable against the tender regions of the skin.
As someone who worked around some pretty hot equipment (making rubber belting products) I can tell you that your hands, especially if they are callused can take a lot more heat than other places. Your chest for example. Or even the sides of your elbow joint (As I know from personal experience, including some scars that took a decade or two to completely fade away) To this day, and it's been 38 years, I have no problems with holding plates that the waitresses use a towel to move from their tray to the table. Blows their minds. :)