I have long thought it would make more sense to refer to the two load-carrying wires as “loadA” and “loadB”. The so-called traveler wire does not differ in any way from the “load” wire - - - other than its ability to confuse!
The “traveler” is a terminal used by the electrical trade. Its not likely to change and I’m not sure it should. Electricians have to deal with many more configurations that just a dimmer and a bulb.
Now if I read instructions that included loadA and loadB I’d be off looking for the 2nd load.
Its really really difficult to make any instructions be interpreted exactly the same by everyone.
Especially since sometimes the traveller is special, and not just another “load” conductor. For example with “auxiliary” switches that we discuss occasionally in these forums, or Lutron Maestro “companion” switches (the same idea, but predate our smart switches by many years), the traveller does carry some voltage, but not enough to power the load – instead it is used for communication.