In a corporate environment most emails are TLDR. Quite often a big boss will forward a mail to the whole department "please read". It's 5 pages of waffle. Is it useful or not? Either I spend ten minutes reading or ignore it, or ask a person or bot for a summary. For a dyslexic person, to read a large block of text that is unclear if it is pointless or not, is a lot of cognitive load that you cannot afford either.