Let your work to be worship

As for soldiers, policemen and those who stay up during nights for safety of nation:

They should know that their actual worship is to realize that they should be as the prophet said: "Two eyes never be touched by Hell, an eye wept for fearing Allah and an eye stayed up all night guards for Allah's sake."

Their worship is not to recite Koran, weep or stay up nights performing prayers. Don't they read what Allah said when He exempts fighters from Nawafel such as reciting Koran and staying up nights, He says:

"Verily, your Lord knows that you do stand (to pray at night) a little less than two-thirds of the night, or half the night, or a third of the night, and so do a party of those with you (older people), Allah measures the night and the day. He knows that you are unable to pray the whole night, so He has turned to you (in mercy,. so, recite you of Koran as much as may be easy for you. He knows that there will be some among you sick, others traveling through the land, seeking of Allah's Bounty; yet others fighting in Allah's Cause. So recite as much of Koran as may be easy (for you)," 73-20

They say that staying up nights is a duty, for whom? For older people who retired, but the verse is clear about those who are seeking Allah's bounty and those who are fighting in Allah's cause, it excuses them for not doing these Nawafel because the deeds they are doing (working for sustenance, fighting for Allah's cause and guarding homeland) are more important than these Nawafel.