Unfortunately, designers get sucked-in to incorporate the "latest technology" *
No doubt they've successfully used this measurement system for many years in industrial processing and Laboratory work.
An Aircraft is operated under somewhat more "rugged" conditions. If impurities can contaminate the fluid under measurement, to the extent the reading is wildly inaccurate, it is, IMHO, the wrong technology for that job.
float/resistance-wire and sight-glass (tube) systems are crude but robust and effective.
The pilot, however well-trained, is not normally an electronics engineer or laboratory technician. How the hell is he expected to know, memorise and understand the foibles and complexities of a "simple" fuel-gauging system which is too delicate for unmonitored field conditions.
Bloody stupid, needing to monitor the monitor
