Your analysis of the tones in the two phrases is insightful. The phrase "defendants would get nervous in cameras in the courtroom" indeed conveys a concerned tone, as it suggests anxiety and discomfort that defendants may experience under scrutiny. This concern could stem from the potential bias or judgment they might face in such a public setting.
In contrast, "a closes loop in challenging the status quo" reflects an explanatory tone. This phrase seems to denote a systematic approach to addressing and questioning established norms or practices, suggesting a process of understanding and potentially redefining current perspectives.
If you need further exploration or specific contextual applications of these phrases, feel free to ask!