Man, that description for Destiny 2 is just the tip of the iceberg.
After kicking out the invading force, you're then tasked with killing their god-emperor. After that, it's off to awaken the old god-like super AI. Next up is killing an ancient god-like wish-granting dragon. And then, you're off to the moon, when the embodiment of Evil/Death/the cause of all evil is lying in wait.
But yeah, since it went F2P, they... heavily started piling on the cosmetic microtransactions. Cosmetic stuff such as armor shaders, shells for your mini-robot companion, emotes,... Also, only the basegame is F2P. The DLC's aren't and without them, the game is nothing more but a large demo. Most of the attention is in the end-game content, which is only viable in the DLC's.