Instead of leaving it to the useer, it’s as if you want to change it to "follow the list of this mainstream person/newspape’.
The instance admins are free to express themselves just as much as any other group of people. If you don't like the outcome of their decision then you're also free to go and create an instance or move instances.
If a majority of their users decide they don't like the actions the administration of that instance are taking they can always move instances to one that more closely aligns with their viewpoints. If they choose to stay then clearly they agree and are very likely part of the group you clearly don't want to be associating with.
Nobody is entitled to the service that instance admins offer, and users are free to move as they see fit. Reddit made a unilateral decision we didn't like and now we're all here, why is a Lemmy instance any different?