What would an "objective neutral AI model" look like?
The training data itself is just a snapshot of the internet. Is this "neutral"? It depends on your goals but any AI trained on this dataset is skewed towards a few clusters. In some cases you get something that merely approximates a Reddit or 4chan simulator. If that's what you want - then great but you can see why some people would want to "debias" that outcome!
You might argue the "world as it truly exists" is the correct target. But bear in mind we are talking about human culture - not physics and chemistry - you're going to struggle to get both consensus and any sane methodology for getting that into an AI.