I'm not sure the assumption that the comment above you is somewhat delusional is not necessarily reasonable here. I do think its that people are interpreting "everyone" differently.

To me, 'everyone' does not mean literally every person but rather the vast majority. Whether this number is 95% or 90% is going to be interpreted differently. I think nearly all of us can agree that as intelligence falls on a bell curve there will always be those unfortunate enough to not be able to do certain tasks. However the nature of the bell curve does mean that around 90% of people are above ~80 IQ.