Even without confrontation, it can potentially uncover facts.

Accuser: “I woke up naked in the accused’s room. There was a used condom on the bed and I was sore. I threw on clothing and ran out of there.”

2 Witnesses: “I saw her running down the hallway from the direction of accused’s room that morning.”

Accused: “What posters were on the wall of the room you woke up in?”

Accuser: “They Might Be Giants and Little Mermaid.”

Accused: “That is my neighbor’s room.”

Yes, I would generally assume such details would be worked out long before any sort of hearing, but it is definitely the kind of detail that can be uncovered by a cross-examination.