yeah, agreed its extremely difficult to adjust. Sorry if I didnt quite understand your point before
However, you cannot just follow GTO charts to the letter as explained before. If you want to, thats fine and in certain situations, as you correctly point out, where adjustments are extremely marginal then its not hurting you too much. In practice though, players (especially at micro stakes) are playing so far from GTO you have to adjust. How you do this is through study off the tables playing with the ranges in different spots, and a lot of practice
This is my understanding of the theory anyway, maybe someone better than me can chime in and correct me