The early design stages are where many DESIGNERS get sidetracked by aiming for visual perfection, instead of practical usability. Whether creating a website, software, or physical item, the preliminary conecepting is meant to convey ideas and give you a sense of whether or not the product is viable.
If you keep it simple early on, you can test out multiple low-fidelity iterations before over investing in Time and resources.
The simpler something is, the easier it is to use. With fewer distractions, choices, and clutter, we can’t help go from A to B more efficiently.