Fahrenheit was defined the way it was not because it was "invented to be useful and practical", but because a mixture of brine to set 0℉ was easy to concoct reliably. That's as close as it got to being "practical".
Every other argument seems to boil down to "I'm not familiar with it, so it's hard", "dealing with 10s is easier than 5s", and "Fahrenheit has more resolution because I've forgotten decimal numbers exist".
The actual superpower of metric is that all the units relate to each other in simple ways. For instance most liquids you and I deal with on a daily basis have a similar density to water, so if you've got 100g of it, it's going to be ~100ml. You don't need to deal with arbitrary artifacts of the measuring system beyond the unit prefixes.
Every other argument seems to boil down to "I'm not familiar with it, so it's hard", "dealing with 10s is easier than 5s", and "Fahrenheit has more resolution because I've forgotten decimal numbers exist".
The actual superpower of metric is that all the units relate to each other in simple ways. For instance most liquids you and I deal with on a daily basis have a similar density to water, so if you've got 100g of it, it's going to be ~100ml. You don't need to deal with arbitrary artifacts of the measuring system beyond the unit prefixes.