I like this piece on jargon by content designer, Amy Hupe, because it acknowledges the nuances of language and even clear language.

This is a fantastic paragraph:

Jargon always gives power to those who understand it, and takes power from those who don’t. It’s really important that we recognise this and think about who we’re empowering and disempowering when we use jargon.

Yes, in most cases, jargon should be avoided. But jargon can empower people and communities too. I think this is why it's important that we don't get all... preachy about clear language. There is never one way of approaching a piece of writing. And it's absolutely vital to understand who it's for.