Actually, I just used that as an example benefit for the site on the SE network. It wasn't a complaint that the current sources are not good enough...
Take Magento for example, I've always found the Magento SE site to be far more effective at getting help to a specific problem instead of via their forums (which largely consists of very basic topics whereas on the SE network, it's largely used by those developing on the platform).
On the Discord server, whilst a great community and an asset, I'll never be able to easily refer back to a previous conversation or discussion where help was given.
This forum will obviously be indexable and be of great use to those that use it. But many will not use it and it will solely rely on people like yourself putting the time into contributing - which is great, but if you and a handful of others that are spending your time on here are not around, then it will take too long to get answers or threads will go unanswered.
As for the official documentation, I think it is well structured and laid out - I just don't find the answer to my specific problems. I'm not sure that's a result of poor docs though, just that there is too many scenarios to cover all basis.
Hope that provides more clarity.