Well, no....of course not. There is more. And, good poster OKTexas, if you had watched the hearings in full you would know that. What the OP was offering, and explained in the first post, is that these 'takeaways' are journalistic devices intended to condense and simplify the testimonies of a thousand witnesses....and those testimonies themselves distilled down to just a few for each individual hearing. And, to condense the thousands and thousands of pages of documents so that the Committee could show to the American electorate the most telling, the most indicative for the point they are making in that particular segment of a particular hearing.
Really, poster OKTexas, I would highly recommend you go to any one of several archival collections of the hearings. YouTube, for example. C-Span is another. Listen and watch the hearings. In that manner, you will understand that there is far more than these 'take-aways' offered by news sources in a tactic to address the too often too short attention span of today's busy Americans.
----------------------------------------------------------------------------
I do not know when or if the 'lack of security' will be explored. If I recall, that has been explored in Congressional testimony prior to the Select Committee's televised hearings. Didn't we see any number of Capitol police describe their horrible day under attack by Trump supporters on J6?
But, as a nuance to your concerns over an 'egregious lack of security' you need be aware that Don Trump and his enablers took pains to keep secret from the DC police and the Capitol police their long prepared plan for a 'march' at our legislators assembled in the Capitol. If....if.....they would have properly applied for a 'march' permit...as is required by law....that act would have alerted authorities that the assembled rallygoers were NOT going to be confined to the Ellipse as the duly issued original permit stipulated.
In hindsight, with notice of intent to march, the authorities we can presume would have manned up....both the DC police and the Capitol police. Traffic and pedestrian barriers could have been installed along the route and at the Capitol. Instead, the surreptitious plans to march at the Capitol flung thousand of intentionally angered rallygoers at a thin blue line of officers.....with near 150 of them injured, some crippled for life.
So, sure, we can ask why more DC police and Capitol police were not manned up for the day shift on J6. But we need also pointedly inquire why Don Trump, Roger Stone, Mike Flynn, and the various enablers intentionally hid their long incubating plans to attack the Capitol. Hell, ask Steve Bannon too. He clearly signaled he knew mayhem was planned....he said so in an interview or on his podcast that we've now seen repeated on broadcast news.