Tos is the face because it existed during a more monoculture era and those in power keep returning to it.
No. Your entire premise is woefully ignorant of
why TOS resonated--tapped into viewers of numerous racial/ethnic backgrounds, and their desires or dreams about a proposed future, as opposed to pre-TOS sci-fi, the majority being populated by all white characters (e.g.
Lost in Space) in an all-white future.
One of the key points of TOS was to challenge the notion of the aforementioned all-white future with characters that projected
--provided a
hint of the kind of future being fought for on the streets during its production era. TOS resonated deeply and quickly became a pop culture phenomenon in part for its recognition of
The Other as an essential part of
everything--the fabric of life. That was a message that played a significant role in TOS earning a legendary status, which grew exponentially with each passing year.
A side of my family were certainly not among "those in power", yet many became lifelong TOS fans from those watching it on NBC, to younger members discovering in the decades to follow.
So, your idea of "those in power" returning to TOS (as an "explanation" for its success / status over the decades) is about as historically dishonest as saying "Bull" Connor was one of the staunchest supporters of the American Civil Rights Movement.
That's not an excuse to bash the other shows
Perhaps the other series would not receive the level of criticism seen if certain series--such as Berman Trek were not so decidedly heartless, and more about New Agey finger-wagging than the core creative strengths pioneered by TOS.