Where do these formulas take into account your pedalling style? If you pedal heels down then you need your saddle lower than if you pedal toes down. I havent seen a formula that takes that into account.
Correct.. A formula like the Lemond method or 109% rule will only get you into a narrow +/- range since they’re based on ergonomic averages and aren’t absolute, they can’t be. ie they aim to save you from having ‘to spend quite a while pissing about’ and make it ‘just a bit of tweaking’. Much better I think.
If that’s stupid, then I’m a grade-F dumbass )