Wish Try ... Finally ... End block needed

LucaMs said:

I preferred the times of the punched cards

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I preferred the days when we filled in the (OMR) cards with pencils (40+ years ago). The lineups for keypunch machines were pretty long back then and I don't like waiting in lines. Ironically I found a bunch of these unused OMR cards in the back of my desk drawer two weeks ago. I wonder if I can still use them somewhere?
And yeah, I know I should clean out my desk more often.

I am not saying it is not needed or would not be added because I am not Erel
but can someone explain a situation that can't be handled or is hard to be handled without Finally block ? I do not think I understood its importance .