Exactly.
This "technique" of measuring and COMMUNICATING has it's place. It is one measurement "tool" amongst many, same as we would use a bevel, combination, or framing square depending on circumstance.
I can look at the same "mark" on a tape and simultaneously see 12-6, 12 3/8, or 12.375; I will use what is appropriate for the task at hand.
To divide panel's evenly in a space, I would use fractions.