What's the legality of copy/pasting or rewording interesting guides and resource posts from Reddit?

Let's say you find a subreddit with a very interesting guide that contains no private information.

What's the legality of copy / pasting that text over here? And if it is reworded, manually or with chat gpt?

The assumption here is that it would be done manually without scraping.

Edit: it looks like Reddit does not help the copyright and there wouldn't be massive issues if we created a community to copy over posts with useful guides and tutorials. I can't create it since I'm not on lemmy.world and wouldn't have time to moderate it, but I would contribute if a community like that existed.