......If someone listening thinks you’re announced intentions are going to cause a conflict, then they’re definitely going to say something, and you can change your plans accordingly......
In a perfect world, yes.
But IMHO less and less people these days are staying aware of the "big picture".
AKA situational awareness.
The other day, I was riding with a friend, he made a "6 miles west" call.
Just as we're entering about a 2-1/2 mile 45, we hear a "on the 45" call from someone,
and there he is--
perfectly set up to conflict with our entry.
No big deal, we maneuvered a bit to compensate--
but if he'd responded to our 6 west call it could have been coordinated a lot more smoothly.
Seen the same thing with people doing touch-and-go's--
in spite of others reporting on the 45 or whatever,
they turn crosswind & then downwind at the same place as they always do and cause a conflict.
When simply extending their upwind leg by about 30 seconds would have allowed everything to happen smoothly.