If for no other reason, to hold journalists and Intel community figures accountable.
Also, why has there not been a special counsel appointed to look into the matter?
We can say: "Good, Trump's not president and it doesn't matter how that came to be." Like Sam Harris did. But setting that good outcome aside, it must be investigated in the open, with transparency. To not investigate would be a "threat to democracy"!
Link: https://youtu.be/3zZdIdxhuuY