There really should even be matchmaking for raids. Or at least some in game way to meet people to play with.
Seriously, it's 2017. We've figured out social stuff in games. Having to use a third party app to find people to play with is unacceptable.
I have only two friends that play destiny with me. I cannot find anyone to do stuff that requires more than 3 without using some random website.
The game should have LFG lobbies you can set up, with voice chat to set up teams and what not.
If you don't like it, you don't have to use it. The thing defenders of bungies actions constantly forget is that nothing has to change with the way you interact with the game, but games are supposed to be accessible.
There are plently of compotent players that could work together to finish Nightfalls, raids, etc, that don't have some pre-existing relationship with eachother.
People use these group finding solutions because people want and need them.
I just want something in game, that's convienient and part of the experience.