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Why did World War I commanders often direct battles from headquarters far behind the front?

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tactics Sumerian phalanx, a block of foot soldiers depicted standing shield-to-shield, presenting spears, and advancing in a dense mass, detail from the Stele of the Vultures, limestone bas-relief, c. 2450 bce; in the Louvre Museum, Paris.

During World War I, commanders from the division level and above rarely visited the front lines, preferring to direct operations from headquarters located far to the rear. This shift in command style was driven by several key factors:

Technological Reliance: The development of the telegraph and telephone allowed commanders to manage large-scale operations from a distance. Consequently, they transitioned from observing the battlefield firsthand to relying on reports and maps, replacing the traditional "glance" at the field with a calculated "estimate of the situation."1
Nature of the Battlefield: The static, entrenched nature of the war made the front lines difficult to observe. Even if a commander had visited the six-foot-deep trenches, the landscape—often obscured by barbed wire and the devastation of no-man's-land—would have offered little visibility of the enemy.12
Communication Infrastructure: Command relied on immobile, wired communication systems that were often buried for protection. These systems were inherently inflexible, further anchoring headquarters to fixed, rearward locations.1

While these methods were standard for the era, the reliance on fixed wires and distant command often hindered the coordination of rapidly moving forces.3