Exactly. It reveals how wrong some sources are, but also how many of them are correct.
And I think it is important to show that height, because if not, an illustrator can intrerpret it as one more estimate and change it to his (or her) own estimate when drawing, leading to the wrong height.
Imagine a 33storey building that, according to Google Earth, is 87 m tall because it has a low floortofloor height. But then an illustrator doesn't trust that supposed estimate and changes it to 100 m, giving each floor 3 m and rounding up.
That would lead to an unrealistic and imprecise diagram.
