The messages interface is already cluttered, adding every single notification anyone could possibly think of would make it more so. When considering whether to add something to the game, the question should be 'why', not 'why not'.
Let me start off with saying, i do agree with the reasoning here.
A separate suggestion could then potentially be (not wanting to hijack thread but...) to de-clutter the messages interface.
Personally i already considered writing a quick configuration app for the messages already in place with features such as:
- Set all of a certain type to YES/NO.
- Real time search, REGEX capable, results update in real time when valid search term.
- Better categorization.
- More documentation, what is popup, what is icon, what is log.
- Predefined templates for various play styles.
I mean, it's easy to do... But i'd rather play the game i paid a substantial amount of cash for with almost all DLC included.
The "why" as i see it has already been answered, it is useful for a small subset of players.
It's the how that is the problem, adding options for say 2,000 different messages would be a lot of work and it would completely destroy the messages interface.
Which is where such options, if any added, should end up in a separate "extra messages" config file for power players.