[IEEE754]

> Over the past 50 years, my computer has adapted to how humans normally operate in nearly every other way. Why do they continue to use this system which produces results different from what any normal person expects?

If you look at any low level hardware it's behavior will be alien and unintuitive to most end-users, your computer has not adapted, only it's ability to support sophisticated high level software that abstracts these things away from end users has improved.

FPUs are no different, calculators round output to 10sf, and as a result most users think calculators are perfect, and that's usually fine... it's not fine when you do programming, because eventually you will need to understand the fundamental limitations of the hardware and more generally finite numerical computation regardless of implementation.