ANSWER:

This is because Allah has asked us to take precautions and we dont know what is destined for us. 

Prophet salla Allahu alaihi wa sallam said tie the camel and have faith in Allah.

I have a thought that is if everything is predestined 50000 years ago about death and life then in this pandemic what is the use of social distancing and precaution when the one who’ll die will die anyhow.

Divine Will and Decree | September 18, 2020 8:32 am
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Sheikh, why did Allah create so many ppl knowing that majority of them will go to hell? He knew that most of his creation would not pass the test and only few will be in heaven,before even creating this world and the human beings.I want to get an answerfor this. Not than I’m insulting God or anything.I totally believe in Him but certain questions arises in my mind.
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It is said that nothing can happen without the permission of Allah (SWT) so do we do sin with the permission of Allah (SWT).