Phrase request: emphasizing benefits of performing an activity that is often perceived as boring
Solution 1:
I would use the word chore.
It perfectly conveys the sense of necessity over enjoyment.
Checking your statement for errors may not be the most enticing chore, but it pays off dividends later.
Solution 2:
‘Necessary evil’
Something that is repugnant, yet worth doing as it brings valuable benefits.
https://idioms.thefreedictionary.com/a+necessary+evil