Whole idea is taken out of context. There is nothing about "superhuman 10x dev" it was simple realization that IN ONE TEAM there are developers who are 10x faster to deliver tasks and there are slower devs.
Just like in university group assignment there are slackers and there is that one person who does the assignment.
Worst of all is that people start assigning "10x" to themselves or others or judge others as "0.1x" - which is meaningless out of very specific context.