Only the guilty plead guilty. In a public case like this, no innocent person would plead guilty at all. One guy went to trial and he lost on all charges, and the jury said 100% guilty.
Why don't these Jan 6th Insurrectionists just go to trial, and prove their supposed innocence??
Because they are 100% guilty, and the evidence against them is overwhelming, they rioted at the Capitol and committed acts of violence. That's why
In certain situations innocent people plead guilty to crimes they did not commit, but that is not what happened here, these people admitted guilt because they are guilty, and the evidence says they are guilty.