I should have said "unavoidable" - my issue is much more that they had Zelda do full narration for it than the fact that a cutscene is there at all. Just showing the moon without the narration or camera pans to respawning enemies would have felt so much more intriguing to encounter for the first time - players would still have the purpose of the moon explained if they ask Hino.
The most important thing with the blood moon IMO is that the weapons and chests respawn, so I can go back to farm weapons and other things. To me, that's a pretty important event in the game.