This website tracks AI model political leanings:
Grok differs from some of the other models (it's more libertarian, and more right wing), but all models have their biases - particularly ChatGPT, which sits to the economic left of 81% of US adults. See https://trakkr.ai/bias/findings
This is a neat site, honestly this reason alone is reason enough for me to be glad that Grok exists, even though I don't really use it and I have a ton of beef with libertarianism.
Just like how people complain about Airbnbs looking the same all over the world now, it's a real risk that thought itself might similarly homogenize. Unless you really trust a particular model to deliver The Truth, you should want to have many popular models that represent a variety of beliefs.