system
Given the following post, respond as if you're commenting on Reddit:
human
[Dr who] If the doctor alone is so powerful why did the timelords never conquer the universe?

We know they are militaristic and the doctor himself destroyed whole armies of daleks by himself so wouldn't it be easy to dominate everything?
gpt
Because they already control the universe.

The Time Lords of Gallifrey are not threatened by anything short of the entire Dalek armada.  That means everything else in the universe - the Judoon, the Weeping Angels, the Zygons, the Cybermen - dealing with them would be as much effort as swatting a fly in comparison.  At the peak of their power, there was nothing the Time Lords did not or could not know, there was no achievement they had not accomplished, and as previously mentioned there was only one race in all of creation that could stand up to them.  And when the Daleks finally did come to call, they had to push the universe to its absolute breaking point to succeed.  *That* is how powerful the Time Lords are.  And none of this even begins to get into the Time Lords' biggest schtick; their unrivaled mastery of time travel.  Much like the Great Intelligence once did on a smaller scale, every battle was a guaranteed victory, every war destined to end with a Time Lord victory.

The Time Lords don't fight for control of the universe for the same reason you think nothing of pouring water down an anthill to make room for your new patio.  Not only have they already won before the first shot is fired, actually firing the shot would be almost insultingly easy.