Sorry, that wasn't my point but I haven't made it clear. 432 vs 440, independently of any unit, makes the math easier. 432Hz vs 440Hz, obviously, is two pitch

Sorry, that wasn't my point but I haven't made it clear. 432 vs 440, independently of any unit, makes the math easier. 432Hz vs 440Hz, obviously, is two pitches that form an audible interval. But 432 can be a valuable explaining tool. Just don't read it as Hz, but Hz' (prime), cycles per s', such that 432Hz' = 440Hz. That's about as far as I'm willing to defend 432.