I think the phrase you're looking for is that it's not heavily moderated to be bias compared to others.

Plus, given that it is trained on X data(mostly), and most people on X consider Elon to be a bank of lies, Grok is just going to work with what the majority think(post).

It mostly just pulls data from X from my experience using it.

That is a big flaw to Grok and I wouldn't say it's better than the likes of ChatGPT — personally think ChatGPT outperforms Grok in a lot of ways.