Time dilation is a real phenomenon predicted by the theory of relativity, which states that time can appear to pass differently for observers in different gravitational fields or relative motion. However, it's important to note that the effects of time dilation are typically only noticeable at extremely high speeds or in strong gravitational fields.
In everyday life, the differences in time dilation between individuals are negligible because the speeds and gravitational fields we encounter are relatively low. For example, the time dilation experienced by a person standing on Earth compared to someone in orbit around the Earth is minuscule.
To observe significant differences in time dilation, one would need to be in extreme conditions, such as near a black hole or traveling at a significant fraction of the speed of light. In these situations, time dilation becomes more pronounced, and individuals in different reference frames would indeed experience time at different rates.
In essence, time dilation is a real and measurable effect, but its magnitude is usually so small in our everyday lives that we don't notice it. It requires extreme conditions or high speeds to become noticeable and significant.