JohnS,
Height and Limb length dictate how far one must move a weight.
The longer the distance to move a weight the harder it is on joints and the heavier the lift feels.
It is ,for many,especially those not on growth enhancing drugs ,to build size and strength if the limbs are longer,as one gets over 5'8" the limb length is longer and greatly impacts how the body structure,over all,sets its self for heavy lifts.
(Body tends to lean forward or back,squats put pressure on knees and hips,benches put stress on elbows and shoulders)
Look at an Arnold compared to his buddy and training partner Franco Columbu.
Arnold ,even though a strong lifter,could not lift the weights of Columbu,and look at the legs and arms,though big,Schwarzenneger's look thin as compared to the smaller structured Columbu,or many other smaller Boby builders.
Look at a sprinters legs the taller they get the leaner they look as compared to their shorter competitors.
Limb length in a taller person is good for stride distance,but they tend not to produce the speed or power of a shorter more average sized runner.
Hope this helped answer the question