Objective and simple. And having some baggage. That's what metric is.
And celsius is fully objective and simple, with none of the baggage the meter, kilogram or h:m:s have.
No one said metric was perfect, because it's not. It's the dumb dumb standard we have. But it works well enough for the vast majority of things.
Firstly: I'm not the downvoter.
Secondly: you didn't have to - you chose to.
And as most chatbots list sources, you can always check them out yourself and cut out the middleman. Most of academia - some 45% do that. Another 45% don't even bother. A lone 10% still do things the old fashioned way. In any case, you're not alone in relying on AI to find obscure information.
With search engines becoming increasingly infested with low-quality and obvious-slop sites, relying on the same methods as the slopmasters isn't even a big stain on your morality. Because of it was, the slopmasters would be drowning in the ink required, and billionaires would already have caused another biblical flood of it.