It's also fine for a page meant for a specific audience. It's not like they want to attract random developers working outside security.
Whenever someone says something akin to "Hey that project's page didn't explain/market their offering well enough for me!", an obvious counter question is "and who said their intention was to promote it to you?".
Sometimes the complain is legitimate (e.g. a programming language or project that wants wide adoption should explain what it is clearly and attractively in its webpage). Other times it's just that not everybody is the intended audience, and they explain what they do well already if you're the intended audience (in which case you know the terms the use, etc).
>I'd be curious to know about HN's sorting algorithms, this topic seems such a niche thing that I'm amazed this page reached #1...
Perhaps enough people know about this stuff already and voted it as soon as they saw it? I didn't know what Red/Blue teams are, but there are several security people here that do.