Even if she advances to the general, I'd say she's a big underdog against Schiff. He has stronger name recognition, roots to CA, bigger donor base, more endorsements, and I could see him doing way better with GOP voters literally just cause he's a white man. Why give away a seat that is probably safe with her, but probably lean D with another Democrat, especially if the GOP nominates a strong candidate like Scott Baugh.
Because there's only 20 or so people in the House that have real political power. The rest of them are told what to say, do, and think by leadership.