That's deeply concerning, especially when these two companies control almost all the content we access through their search engines, browsers and LLMs.
This needs to be regulated. These companies should be held accountable for spreading false information or rumours, as it can have unexpected consequences.
Did they ? Lots of people, and some research verify this, think it has a major left leaning bias, so while usually not making up any facts editors still cherry pick whatever facts fit the narrative and leave all else aside.
It's a bigger problem than AI errors imo, there are so many Wikipedia articles that are heavily biased. A.I makes up silly nonsense maybe once in 200 queries, not 20% of the time. Also, people perhaps are more careful and skeptical with A.I results but take Wikipedia as a source of truth.