Does scientific advancement affect the amount of reward for believers, such that the reward of the martyr and the sick is diminished because they do not feel pain as their predecessors did?

The martyr's reward is not diminished by the ease of death for him, as the Prophet, peace and blessings be upon him, said: "The martyr feels no more pain from being killed than one of you feels from the sting of a gnat." Death by bullets or otherwise is not necessarily less painful in the modern age.

As for the decrease in reward for illness when taking painkillers, the reward increases with the severity of the illness and its spread throughout the body, as the Prophet, peace and blessings be upon him, said: "No Muslim is afflicted by harm, be it illness or anything else, but Allah will expiate his sins as a tree sheds its leaves." And Abu Hurairah said: "No pain that afflicts me is dearer to me than fever, for it enters every joint of a human being, and Allah gives every joint a share of the reward."

Furthermore, the reward of one who foregoes treatment and endures patiently is greater than the reward of one who seeks treatment, due to the virtue of patience in the tribulations of this world. Choosing the more difficult path is better for one who knows they have the strength for it, and this difference in merit exists even among people in the same era.