Both of my hands are quite dexterous, but I still often find myself typing with one finger if it's on a smartphone (I'm still not used to typing with my thumbs), or one hand if I'm on a normal full sized keyboard (such as when I'm eating or snacking). I've owned a split keyboard before (MS Natural Elite) and it was fine, but I'm unlikely to ever buy a split keyboard again.

yes. will have a hard time kbding on split keyboard while looking at the screen,which is directly under their hand movements.