Here's the US Army field wire splicing technique, pre-WWII.[1] No soldering at all, just tie the two wires together with a square knot, put a single copper strand through the middle of the knot, and wrap the strand around the wire on both sides of the knot for better conductivity. Then tape. When splicing a pair, the wires are spliced with the splices staggered about 6" apart.
Watching old training videos like this and documentaries[1], it's striking just how much better they are at conveying information.
They take their time. Shots linger, no jump cuts. No-one is driving around while talking, interspersed with random unrelated scenery shots. There are periods of silence.
At least on TV, most documentary style shows try to be so flashy and "cool", with lots of unrelated content that serves no purpose except to make it harder to think about what is being conveyed.
The difference lies on the purpose of the videos. Sometimes you want to convey a message, sometimes you want to sell ads. Each type of video is optimized for its intended use case.
A couple of other examples: an old US Army training video on the workings of various categories of firearms [0], and an old video on how transmissions work [1]. Both make great use of physical models of the mechanisms.
I would consider a soldered joint a bit of a different class of joint serving a different purpose. They are more physically durable, carry higher currents, and resistant to corrosion interrupting the link.
A twist or knotted joint is obviously fast and simple. But in the wrong environment it will degrade quickly. Are you laying a charge to be blown in five minutes, or laying buried communication lines to use for six months?
[1] https://youtu.be/XGO9dboctkc