I have no skin in this particular game (Though I work in the sequencing industry), but... I don't think anyone is fooled/trying to trick anyone when they say "whole genome sequencing" or that they sequence 100% of the genome. That is the term of art for non-targeted/unenriched sequencing of DNA (nb: it may be RNA/ribosome depleted, so fine it's technically enriched but not in a meaningful way). Also exons are genic region, are you thinking introns (arguably genic or at least adjacent), or promoters/enhancers and chromatin state?