I'm not talking about aesthetics but conditioning. IMO, if people are used to being exposed to such stuff it's no wonder they're more open to conspiracy theories or develop a very loose attitude towards facts.
I mean, if we dig deeper the reason why the authors of such videos phrase them the way they do is that they don't trust the audience to draw the right conclusions themselves. It's not enough to tell them what happened, you have to play dramatic music in the background, remind them in martial language that "blood has been spilled" and that the protesters "killed five people" etc. Now these things aren't necessarily untrue but the phrasing is debatable and left intentionally vague in order to be openn for interpretation - that's exactly how conspiracy theories come to be.
Now what that does is
a) it teaches recipients that it's okay to bend the facts as long as it serves a favourable agenda
b) people get used to news/political campaigns being entertaining. That moves the focus away from information and hard facts.
c) people of differing opinions notice the not really subtle approach to influence the audience and the consequence is
reactance. This not only expells people from the trustworthier media outlets (and drives them towards conspiracy theoriests) but also contributes to an even bigger divide between the political spectrums.
All this contributes to people becoming more prone to conspiracy theories. It's only natural that the American people, if they're constantly exposed to such deceptive campaigns like that, are drawn towards Qanon and co. Even electing a former game show master as their president is in line with that.
I think it doesn't really matter where this practice stemmed from. However, as long as even "the good guys" continue using this instrument and indirectly legitimize it, the problems will only get worse (see above).
Trump, Qanon, all that stuff - I think the underlying cause of those developments is is that the American people have been conditioned to value entertainment over information.
And I don't believe it's without alternative. IMO your view on this is pretty fatalistic. You've experienced the consequences and if you continue like you do it was probably merely a pre-taste. The awareness for the problem of alternative facts and fake news was never as big as it is now.