Why does special relativity reject the idea of a perspective-independent present?

Special relativity rejects the idea of a perspective-independent present because it establishes that simultaneity is relative to an observer's state of motion.12

In classical physics, it was assumed that time flowed at the same rate for all observers, allowing for a universal "now." However, Albert Einstein demonstrated that if the speed of light is constant for all inertial observers, then the timing of events must depend on the observer's frame of reference. Consequently, two events that appear simultaneous to one observer may occur at different times for another observer moving at a different velocity.12

Because there is no absolute, perspective-independent fact about what is happening at a given location "precisely now," the concept of a universal present is abandoned. Instead, space and time are unified into a four-dimensional space-time continuum, where temporal and spatial measurements are frame-dependent, while only specific intervals between events remain invariant for all observers.13