All those airports you mention are completely normal 50 feet crossing height (on the glide, give or take a few feet). Seriously, I'm speechless if you are of this belief and practice this in daily ops!!!
The picture, I believe you are referring to, shows an EXTRA distance of 300 meter for crossing the threshold 50 feet too high (= 100 feet high, on a flat unsloped runway).
50 feet crossing height = 300 meter to touchdown, 300 meter for flare = 600 meter.
100 feet crossing height = 600 meter to touchdown, 300 meter for flare = 900 meter = an extra 300 meter.