is it auto strikeout by HR gal if apply jobs without cover letter?
 

sian, if apply 100 jobs den i got 100 cover letters to draft

very inefficient given the time invested always no good outcome, false hope only

As far as I know, public service don't really look at the cover letters that much. For private, if you are a fresh graduate with no experience, you need a cover letter to explain why you are a good fit for the position and why they should hire you. Otherwise, it is very tough to stand out unless you have very stellar grades.