The purpose of the January 6 committee is to further the lie that there was nothing seriously wrong with the 2020 election and to criminalize any questioning of the election. The January 6 riot gives the committee a nice hook, but that’s not what they really care about.
They want to prevent you from admitting the election was irregular, faulty, or anything less than the most perfect election in the history of mankind, and from supporting people who fought against those irregularities. In service of this goal, the January 6 committee repeatedly lied about the actual claims Donald Trump supporters have made about the flaws in the election.
The January 6 Committee is conducting a show trial, not a criminal one. Show trials, common in authoritarian regimes, are held for propaganda purposes, to punish political opponents, and to cover up the truth of what the regime has done.