The parts in the cable are few but the rare earth material and combination of parts to make a good cable are not cheap, let alone to tooling cost to extrude the cable which needs in one case 8 tools set and made in ceramic not mild steel not cheap at all, to pay for one tool we need to sell 100Km of one cable let alone 4 types and over 25 tools set, are you suggesting we should ignore this? would you could you afford to we can't.
The parts in the amps are produce in large number but the PCB and case tooling is still a lot less than the cable tooling.
On top of that the labour cost to assemble this cable set is high as the PCB is built by robot pick and place machine.
The soldering iron are not standard because of the material used the temperature must be high 400C+ and thus so does the solder no lead, and a few other bits added.
Timing the solder is also critical to long heating and good bye cable to short no solder, a skilled job I can do it but others are far far better.