I get what you're saying, but it's not quite like that with ZH. Those guys may not do a bunch of legwork, but they have good instincts for which stories are likely to be worth following up on and which are just lizard man nonsense. Their instincts act as a kind of initial filter.

There are other sites you can go to if you just want to see anything and everything (and there's always Twitter), but the value of ZH (which I probably should've spelled out in the parent) is that they do an initial pass with their noise filter, and while there's still a ton of noise there's also enough signal there after they've done their thing that it's still worthwhile.