Sure, there's a "spectrum". But if you're videoing people without consent to humiliate them for your TikTok content, then you are a dick. And there are so many of those dicks that if you are walking around in public with a microphone and a friend videoing you, I'm just gonna assume up front that you are a dick. There is zero downside for me doing that, and potentially a huge upside. Maybe you are somehow on the "not dick" end of the spectrum of people walking around with a microphone and a film crew, I don't care. You can cry #notAllTikTikCreators all you like, it's always in my best interest to assume you are a dick.
Photo-journalism, particularly of politicians, would be greatly harmed by a permission requirement: is a journalist a shitty person for reporting the truth, even truths that a politician might not like? (And let's say it's something public, like capturing a politician giving a public speech that would appear to be whipping a crowd into a mob, not tabloid/paparazzi type stuff.) Someone photographing or videotaping police brutality?
Intent, I think, is what matters in determining if any one photo/capture is "shitty"; there are instances where you can be a good person while creating photos or videos that might be very detrimental to the subject. Some of the examples from TFA are good examples: creators looking to find people on the street to make a fool of.
[1]: https://en.wikipedia.org/wiki/Candid_photography#As_an_art_f...
[2]: (I'd perhaps also add the last time I surreptitiously recorded someone was because the person was issuing death threats to those around him. AITA? But there are other, more artistic or journalistic cases that I think also have merit, which is why this is a footnote.)
I think if the picture/video is to be posted online or in a gallery, the person in the picture has a right to say how their likeness is being used, regardless of context. If someone's in the background of a video a I would say it's not as relevant, unless the background person becomes the subject unintentionally (as often seen in fail videos).
Surveillance is a different matter. You are notified you're entering a building with cameras, and those also aren't streamed online or displayed publicly.
As for public figures: there's usually separate laws for such things for public figures, AFAIK
It's a spectrum.
When someone is the subject of your video, like the AC/DC person in the article, then YES, you are a shitty person if you post that for the world to see without their permission.