Did you happen to watch the televised portion of it? It was honestly amazing. It was like a legal case that went into detail from all different aspects of that day and what trump did that day and leading up to it. They explained everything that happened on the capitol at any given time and where, how close some statesmen got to the mob, how the mob spread out and what they were doing. It matters because they put in the work to investigate and put the time-line all together. It painted the full picture and it was straight facts.
Discrediting them is just discrediting the facts. That’s why it matters.