PHLAK

To be fair it was a third party partner, not Discord itself. But you of course knew that since you read the first sentence of the article.

One of Discord’s third-party customer service providers was compromised by an “unauthorized party”

There’s nothing wrong with Secure Boot and enabling it can prevent a small subset of attack vectors with no real downsides. That being said, the things Secure Boot does protect against aren’t likely to be an issue for most users but it’s nothing to be afraid of.