This has already been covered. There are security concerns, much akin to why we don't give guided tours of Fort Knox. So let's again ask why their faces are being concealed, and the answer was already plainly and clearly cited, "to protect them(the insurrectionist) from the DOJ". This poses a new question for those who actually read and follow the Constitution, does this disqualify Mike Johnson(et al involved). Section 3 Disqualification from Holding Office: No person shall be a Senator or Representative in Congress, or elector of President and Vice-President, or hold any office, civil or military, under the United States, or under any State, who, having previously taken an oath, as a member of Congress, or as an officer of the United States, or as a member of any State legislature, or as an executive or judicial officer of any State, to support the Constitution of the United States, shall have engaged in insurrection or rebellion against the same, or GIVEN AID OR COMFORT to the enemies thereof.
If you have no argument against this, a simple laughing emoji will suffice.