Destiny 2: The Case for All Activities Adding Matchmaking

At its core, Destiny 2 is a game that is meant to be enjoyed with others. While the campaigns for each expansion in Destiny 2 can be played solo, much of the content in the game is designed with teamwork in mind. This is supported by the fact that most, if not all PvE content, becomes easier to accomplish when the talents of each of the three classes in the game are used alongside one another rather than just focusing on one.

Source: Gamerant