A swage press isn't in the woods or jobsite, and it makes a hard spot that is prone to wire fatigue when they are abused, and can snag on stuff. Being able to just splice up new things is super handy and cheaper too if done when needed. The swage is actually stronger (100 percent strength), and is the only thing to use where the load can twist (undoes the splice), but flexibility is a thing too. Certain types of hand splices (the liverpool i think is one) are actually 100 percent strength too, but can come undone with load twisting. They still have their place, even in industrial rigging, but it's usually for specialty stuff in that world. Ironworkers for example will still use hand spliced ones for choking beams, because the swage will often make it slip or bend poorly.