Sometimes life appears to be a matter of chances and it is not surprising that one person's suffering may be more than that of another. And if the sufferer is a good and noble person it becomes noticeable and sometimes hurts also.
Knowledge is power.
Probably the God before taking somebody in to his fold, he will make him to undergo many examinations and who passes all only will be taken in to his fold.
A student who wants to get admitted into IIT has to take more pains. Similarly a person who wants gold medal has to study more. But a person who wants to get admitted to ordinary engineering college need not worry to that extent.
Similarly who wants to become IAS officer has to struggle more, concentrate more and do well in the exam.
Similarly a person who wants to get be into the fold of God has to take all hardship and pass all the tests decided by God. Only who qualify will reach the God.
If somebody is passing away without any hardships, he may have to take birth again and suffer. Then only he will get the so called moksha.