The introduction sequence is a solid 50% of why Fallout 4's plot was garbage. It was tone deaf, inconsistent, didn't actually make us feel attached to anyone (except maybe Codsworth, but most of his characterisation comes after the bombs drop anyways), served nothing, was linear and force-fed, had no choices, and had cringe-worthy voice acting.
The first time I played through it, I force-roleplayed myself through it just to not ask the obvious questions of the logical missteps that were present in the intro. The second time was cringe-worthy and showing of the imposed limits of the game. The third time clinched it - this was more force-fed than a Call of Duty cutscene. Illusion of freedom, pointless scene, killed the atmosphere. There is nothing redeemable about it, nothing. Even the nuke scene felt done over because after experiencing the surprise one in the first Modern Warfare game (which was actually a great moment), seeing a nuke again in any other game just strikes of a desperate attempt to add a shock factor.
It sets up a completely different image of the pre-war world to what the rest of the game did - all the terminals, holotapes and notes in Boston that were left from before the war all emphasised how the pre-war world was in chaos, with low rations for everyone, strict checkpoints with oppressive military control, rampant crime and looting, etc. This is not the world the intro sequence shows.
A quiet opening to set up the pacing, some would say? There was nothing quiet or well-paced about the intro. The Half-Life series can do good peaceful introductory chapters, Fallout 4 did nothing of the sort. It was unintentionally campy and parodical in nature, and it took away so much from the game. Flawed, pulled off horribly, and worth every minute of this rant I just spent harping on about it, because it was that bad.