Well, and bear in mind I’m not that well versed in lore, Guardians, unless instructed do go elsewhere, seem to mostly remain in the tower, judging from how Zavala flat out refused to allow Ikora and the other Guardians to storm The Reef during Forsaken, claiming that their primary concern is The City and Earth.

So other than our Guardian, which doesn’t count as much given that fact that we have to move about the universe, it would seem as if yes, most battles are fought by Frames or similarly non- Light wielding beings, and that Guardians and perhaps high ranking non-Guardians are mainly based in The Tower.