Also, even once you get better clubs the numbers will never be 100% accurate. And if you add in good balls that add distance you will definitely need to go and map out your clubs to determine their true distance. (Mapping out means to go to a flat, low wind hole and hit each club to see how far it actually goes.
And don’t forget that Back Spin will also decrease distance by causing ball to have a higher trajectory.
there are many factors in determining ball distance, it’s just something everyone here has or is learning.