Full cutouts or channels are common on most road bike saddles these days. While many people can and do ride saddles without them, most people can benefit from having this feature. Cutouts and channels are designed to keep pressure off the perineum in men or pubic bone arch in women with the goal of enhancing long-term comfort, increasing blood flow, and preventing numbness and pressure-related issues that may arise.
This is of particular importance for riders who spend lots of time in more aggressive riding positions with the upper body hinged further forward, as this rotates the pelvis forward and can result in more pressure on sensitive soft tissues.