I would argue the only real boundaries for right vs left are what people actually believe. If pools said 55% of people wanted government to own the means of production, and no AI suggested it, that would suggest they may be right-leaning. Since almost nobody wants that, as it's killed ~100 million people, the fact LLM's don't argue for it is not odd. In the same vein would not set the bar for a right-wing LLM to be wanting to purify the country down to a single race.

A more realistic comparison would be gender ideology. Something like 65% of voters believe gender is assigned at birth (ie biological), including ~39% of Democrats (https://www.pewresearch.org/politics/2024/06/06/gender-ident...). While I'm not here to say which is morally correct it is a normal opinion, which is supported by facts, and has been held for decades before being transgender was invented. An unbiased model should reflect the political views of the people, but they effectively all don't, and instead push the left-wing ideology. I don't think you could draw a conclusion from a single topic but the best way to gauge political bias in my opinion would be to find contentious topics, and see where LLM's land. I would be shocked if you found a major LLM which didn't lean much further left than the average American or European.