It is well known if you ask a Destiny player why they keep coming back they cannot answer. Destiny 2 may be the same grind, go to a planet, kill enemies, back to tower, go to another planet, kill enemies, back to tower but when Bungie bring out a new story, it is full of depth and lore. It captures you and you have to save the Earth. I have put about 1500 hours into this game over several platforms. For me it is the social aspect aswell, meeting new people. This game is absolutely worth it for these DLCs. I will note however that Forsaken is been vaulted 22nd Feb 2022, so you will be unable to access that content. It is still worth it though!