True, but that's also not super relevant to the merits of a temperature scale. Fahrenheit isn't actually based off of human subjective temperature perception, it just coincidentally lines up a bit closer with the comfortable range for people in northern temperate climates.

Before it's redefinition in terms of Celsius, fahrenheit was defined by a particular temperature stable brine solution (easy to replicate for calibration), and with the freezing and boiling points of water set to be 180 degrees apart, because of the relationship with a circle.

People decided we liked base10 adherence more than trigonometry, and then everyone adopted Celsius, so we should use Celsius. Doesn't make fahrenheit some sort of random scale, just deprecated.

Well I'd say that's why op chose the adverb "fairly", it gets across that it's a wide range and lacks specificity.

Not completely useless as a baseline, but fairly general.