^^^^This.
But let’s talk.
That opossum is one proud dude!
Your first premise is wrong. If your using squirrel balls, that is all you need to know to correct aim. If the other folks with you also use squirrel balls, that is what you use to communicate corrections. If you are then forced to convert to opossum balls to communicate with another competitor, then a conversion factor comes into play (note that no linear units are involved up to this point). All angular units, and a correction factor that is a ratio, also in angular units.
Range estimation, and or communicating about range, brings in the first set of units that are uncommon between squirrel testicle lovers versus opossum testicle lovers (y’all need help, just sayin’). And even that does not matter as long as we are all shooting at the same target.
So unless someone wants to use reticle range estimation, or estimate the linear dimensions of some target, there is no need for linear units.
Finally, some of us actually estimate range in other units (opossum balls to continue the analogy).
So communication stays in angular units when correcting windage and elevation. Only a ratio is required to convert between angular units. Or you just tell the squirrel team to figure it out on their own