Jello JDee and you're welcome.
I'll answer your questions by number.
1. You are correct and there is nothing for Apple to update or fix.
2. No
3. Yes this will correct the situation and the only thing you will be missing out on is fancy message formatting such as colored backgrounds, embedded smileys and/or moving gif objects, etc., etc. which IMO don't belong in email messages.
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Why HTML in E-Mail is a Bad Idea.
Because it introduces accessibility problems. When you write in plain text, the receiving mail client renders the text in whatever font the reader chooses.
b When you format email with HTML, the sender controls the formatting.
But this is a trap: You only think your message will render the same way to the viewer as it appears to the sender. In reality, the receiver can end up squinting because the font looks so tiny, or vice versa.
b HTML is not rendered the same way from one viewing client to the next - all guarantee of accessiblity goes out the window.
This is especially problematic for visually impaired persons.
As the link also includes:
I believe that HTML e-mail is one of the uglier things Microsoft has wrought upon the Internet.
And I couldn't agree more and this also ended up causing all sorts of security issues for Windows users which continue to plague them today.
When using a Mac, rendering any HTML automatically when opening a spam message can reveal to the sender your email address is valid causing even more spam to be received.