
Have you ever experienced burn marks on the edge of your boards from your table saw? Some wood species such as cherry and maple are prone to it.

There's nothing wrong with using a power jointer (I still use one), but what if the board has reverse grain and you get tear-out no matter which way you run the board through?
That's also where a handplane shines. You can tackle the edge of a board from both ends to eliminate the problem of reverse grain.

She was.
She was even downright delightful as she whisked away the blemishes. Good girl, Dev. You escaped the burn pile again. Ha, just kidding.
Maybe.
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You can also use a card scraper, cabinet scraper, or scraper plane for these two problems, but planes have many more uses than those listed above.