I apologize if my previous response was unclear. Let me clarify the concept.
In our everyday experience, objects with mass, such as ourselves and ordinary matter, do not travel at the speed of light. Instead, we have much lower speeds relative to the speed of light.
The statement that "everything travels at the speed of light" is related to the nature of spacetime as described by Einstein's theory of relativity. According to this theory, the speed of light in a vacuum is constant and is the maximum speed at which information or causality can propagate. In other words, light itself always travels at the speed of light in a vacuum, regardless of the observer's frame of reference.
However, for objects with mass, such as particles, spacecraft, or people, their speeds will always be lower than the speed of light. The exact speed depends on the frame of reference from which it is measured. Different observers in different reference frames can measure different speeds for the same object, depending on their relative motion.
In our everyday experience, we observe different speeds because objects with mass cannot reach or exceed the speed of light. Each object's speed depends on various factors such as their interaction with other objects, applied forces, and the properties of the medium they are moving through.
So, to summarize, while the speed of light is constant, objects with mass have different speeds due to their inherent properties and the constraints imposed by the laws of physics.