On Ent, Captain Archer, who was new to deep space travel, started saving the galaxy in his first year leading the Ent crew. Just like TOS, Ent used a “ big 3” concept, with Kirk, Spock, and Bones, being the 3, which meant Archer and Kirk were at the heart of just about every A story.
Picard started saving the galaxy n his first year on the 1701D. Yes, he was an experienced starship captain, but Burnham is an experienced Starfleet officer.
I get it if you don’t like Burnham or the actor playing her, or women, or Black women, but complaining that Burnham is too big a part of each story, or she gets too much screen time is just plain silly and a bit disingenuous.