I don't think email marketers think they encompass the entirety of the email industry, I was writing that article from the perspective of being an email marketer proposing something to my peers, ie others in the industry.
Either you do think email marketing comprises the entire industry, or the article title (and HN submission) are (or give the impression of) clickbait.
At least it doesn't seem you are doing any direct tracking on the post though ...
(I used to work for an ISP with a pretty large email service, so it touches nerves that were exposed when our enemies, those companies who try and find ways to irritate our customers, think they are the only important parts of the actual email industry)
This is something I wish ISP's took more care of, they could easily protect users by blocking image loading by default and warning users when links in emails are tracked, for example.