Gardening Literature and Sick Plants

This is a rant.
The Otho professional garden problem solver, one of the largest books (and most comprehensive) for solving plant problems, suggests this as a remedy for juniper root rot.
"When replanting area, use plants which are resistant to root rot."
When one is talking about their 20yr juniper that was grown from seed, this answer is utterly useless.
Another fellow, on the internet, discussed a maple disease he called tight bark syndrome. He claims that it is not a well know disease, because people who have infected plants tend to discard them. He argues that as long as people consider maples cheap and easy to replace, then maple diseases will remain common.
These are problems the plant health professionals are not interested in because common tree buyers don't love their plants - they love things about the plants.
We love our plants.