There is no non-confusing way to address all time-keeping needs in modern society.
Keeping to “human clock time” might work if you’re fine with having a sun dial as your only time-keeping device. If you want mechanical or electronic clocks, you need to define a standard of time that is not directly derived from astronomical cycles, and then you have to contend with the fact that those astronomical cycles don’t actually have constant duration. You may argue that the differences are too small for humans to worry about, but humans want to have fast transportation with predictable timetables, complex machinery with fast moving parts, and telecommunications that run on nanosecond-scale timers, which all require high-precision, i.e. “scientific”, standards. That’s something we get for free with the atomic definition of a second. If “scientific moment” and “human second” were separate units, people and devices would constantly need to do conversions between the two, which would be plenty confusing.
For further information about how all time-keeping is doomed to be confusing, see:
