system
Given the following post, respond as if you're commenting on Reddit:
human
[Destiny] just how powerful are Guardians?

Its hard to tell just from playing the game, as the lore is not exactly presented to the player in any meaningful way, but as the player is able to kill all manner of alien gods and what not, I'm assuming pretty damn powerful. 
So how would the Guardians stand against other comparable figures?
gpt
One important thing to remember is that the Guardians who are tasked with killing the upper leadership of Earth's enemies or attacking the Vault of Glass are the absolute best of the best there is. They're equipped with the absolute strongest (legendary) gear the tower has to offer, which is so rare it's given out sparingly only to Guardians with the skill to earn it. Some of them even have unique one of a kind (exotic) equipment which can't be found anywhere else.

The average Guardian isn't anywhere near as powerful. There's a reason humanity is confined to the Last City by the fallen, and rightly fears a new Hive invasion.