I think you massively overestimate how much the average user knows about computers
The statement was 99.9%, so that's not talking about average users; it's talking about the top 1% or less of users.
If 99.9% percent of users don't know what JS is, that means even a majority of professional software developers don't know what it is.
The statement was 99.9%, so that's not talking about average users; it's talking about the top 1% or less of users.
If 99.9% percent of users don't know what JS is, that means even a majority of professional software developers don't know what it is.