I don't have any evidence, just going by what Honda suggests. Going from a standard b16 to a b16b they upgraded the crankshaft so that it is more balanced, because the rpm has been raised. Anything that spins fast needs to be balanced, a perfect example of this is with your wheels/tyres, when you are traveling at 60kmh it isn't terribly noticeable that your wheels haven't been balanced, although once we reach high way speeds it becomes apparent that our wheels are not balanced for those speeds. It's the same with a crankshaft, the faster you spin it, the more perfectly balanced it needs to be, hence why we have harmonic balancers.

I acknowledge that yes it is possible to raise the rpm and the engine may remain perfectly fine, just like bolting on a turbo charger and not opening the block or lowering the compression. Most of the time the engine will cope, but it's just not 'advisable'.