You answered it yourself.
Not attacking is one of the main differences between LL and ADS.
That simply separates the good players from the pseudo-good players. The pseudo-good players will avoid good battles because they are scared of the possibility of the 20% or lower happening.
In LL you can prosecute all the battles you want without fear of some of them going poorly and putting you in a bad position.
Even I did fully agree with that statement (which I don’t, because there is variability in small battles; Ukraine for instance still ranges from 2 arm surviving to 3 inf 1 art surviving, a humongous difference), does that benefit one side more than the other? Only if LL unbalances the game would I abandon it.
but then they must make choices as to whether they want to attack, continue to attack, or retreat based on the full range of possible outcomes that might occur with the use of dice.
Sounds fancy, but it does not happen as often as you would think. If you really do base your decision on LL counting, then your decision to attack or not is only influenced in strafing attacks. In ADS you simply have to decide to retreat once the battle has already started which doesn’t take much thought either, because you are still initiating the same attacks (minus precise strafes, but you should still strafe in ADS, just with a little more thought about what to send).