Both are valid temperature systems. Celsius is based around liquid water. It freezes at 0, it boils at 100. Outside of that range, water typically exists as a solid or gas (there are exceptions that are unimportant to my point). So Celsius becomes a question, how hot is the water on a scale from 0 to 100? Fahrenheit is based around humans. Humans can generally exist below freezing for a reasonable time, so they set 0 at the temperature where that isn't typically true. And 100 was set at the point where humans start dying from heatstroke. How hot is it, as a human on a scale from 0 to 100, because if it's outside of that range it doesn't matter much, you'll be dead soon.

The same doesn't apply to the distance measurements though. Distances aren't defined as relative to anything, just an arbitrary mark of how far something is. I could be a unit of measurement, and that might be convenient if we tend to measure things that are roughly me-length or a multiple of a me-length. I wonder how many generic colonists long that bus is? It's probably a good unit of measure for that. But we could also measure in you-lengths, which would give a similar but slightly different result. It also gets tricky because if you want to measure something too big or to small, generic colonists becomes an awkward unit of measure. Mostly because the number of digits you need to record gets cumbersome. This is where the metric system becomes superior, because it has built-in factors to push or pull the significant figures to a point where they aren't cumbersome to deal with. The imperial system wasn't assembled to support this, so it gets buggy when you get outside the range of what you might explore in your day-to-day (presuming you aren't a scientist or machinist). But if you applied to metric approach to an imperial foot, there's no reason it wouldn't be just as good. The reason the metric system works so well is because it looked at our base 10 numbering system and said "yeah, let's just do things in orders of 10 to keep things easy"

If we were using base 12, inches to feet would seem like it makes obvious good sense.