This is confirmation you're looking for
https://www.icmizer.com/en/blog/how-...culator-works/
After reading that page, my guess would be not to worry too much about it at the micro's. Maybe in a specific example as mentioned in the link above, but then you're just using logic and you don't need to recalculate with ICMizer I guess. Assuming players are playing Nash ranges at the micro's is giving them (including me) too much credit probably.