Been up The Ben twice. Once was from the Glen, at the top of the road (as it was in the '70s), so 4000' up and no down. We got to the top quite quickly, looked around at the view - yes folks, clear! - and my companion asked where the next bit of uphill was. I waved in the general direction of Norway.
The other time was from Carn Mor Dearg in snow in March - not quite so clear but still some views. Didn't see any tourists that time.
Actually, as for being too high, I reckon another few thousand good, old-fashion feets wouldn't come amiss.