Then Twitter should change the rule and label everyone when, and only when, the Twitter staff have the label changes ready and queued up instead of throwing the rule out the door, labeling a handful of news organizations, and uniformly enforcing it when they get around to it. Uneven, impulsive enforcement with vague future promises is exactly what Musk (and many current/banned Twitter users) complained about before Musk bought Twitter.
And again I think its a fair complaint, not childish. NPR gets a small fraction of their funding from various governments, yet substantially or fully funded information outlets are still everywhere unlabeled on Twitter... which leave them sitting alongside the existing labeled outlets from authoritarian regimes. If I was NPR, I would feel singled out. I would be pissed too.