Splicing makes sense! What many do not know, a knot reduces the breaking load about 50%. With Dyneema® constructions, the current high-tech fiber, a knot can weaken the rope by up to 75%.
On load, a rope stretches, so it will be minimally longer and thinner. This property is used in splicing, because this self-locking keeps the rope in principle itself. A knot, on the other hand, chokes the rope and weakens it at this point enormously. For this reason a rope may not be pressed at all. Not only the pressure can drop out without warning, the fibers are even damaged by the press sleeve and a break point is formed.
In particular, yachts are often equipped with oversize lines, which are not only more expensive but also heavier. However, it is sensible to use the right spliced construction for the desired application. Professional and racing sailors know the advantage of spliced lines and use this to save weight and volume.
With modern rope from Dyneema®, which are spliced according to the requirement, wire ropes can not keep up. The breaking loads are already significantly higher with a fraction of the weight. A further advantage of spliced lines is the fact that they are guided by blocks and rollers, there are hardly any friction points, which means that the leash and rollers are spared.