There is one thing you are leaving out -- the underlying reason why someone has this power is that many people have included the person in their trust list. Those who are on DT1 is (somewhat) random, and does rotate, however the people who are on DT1 are not arbitrary, they have effectively been chosen by the community to have this power.
Indeed, they have been chosen by
a very small minority of the community:
I no longer have a database of forum posts, so I cannot answer these questions.
Of the 133 people who are eligible to be on DT1, how many people included them on their trust lists that have 10/100 merit (how many people actually played a role in selecting those eligible to be on DT1)? Of those who potentially can play a role in selecting who is on DT1, how many people have no one on their trust list who is eligible for DT1? How many people who are potentially able to play a role in selecting DT1 have a trust list, but no one on their trust list is eligible for DT1? How many accounts are actually active by various metrics (such as making a post in the last 60 days, logging in during the last 60 days, etc).
As I said, I don't know the answer to the above questions. But I do think the answers will give context to assertations that a "very small minority" of the community selects DT1. The headline number of users is obviously inflated due to spam bots, and inactive users.