The music was composed by Jeff Russo for the series, there's flute in it, which likely callbacks to The Inner Light, but this is not the Inner Light Suite. As I said, the First Contact theme is just shoehorned in without any consideration for how it matches thematically. The effect is jarring.
I love the First Contact theme, but if you just cram it into a series because "hey this is from a movie people loved!" without tailoring it for a proper fit, you get a compositional mess, and that's what we get.
Ok. I agree it’s an odd choice. I guess I just don’t think it’s jarring because they’re musically similar and FC is a Picard centered story where he struggles with his demons. And a crazy robot lady.