I can create the exact same effect with my Red Epic. In fact in certain situations I’ve done that because the effect works. Like shooting whitewater rapids, where a 1/4000 shutter creates a sparkly effect in the water that really works for that subject. It’s not a flaw, like HMI flicker, it’s a characteristic of high shutter speed footage. I don’t like that look for most subjects.
The NFL is really not relevant here. They’re shooting at higher shutter speeds and frame rates so that slo-mo playback will look better and their signal path includes devices capable of frame blending and interlace for 1080i playback.
I think part of the problem here is that no one has really stated their definition of strobing. Strobing to me is a rapid increase and then decrease in exposure. Using a higher shutter speed when combined with the rest of the proper settings of the exposure triangle will not affect the exposure.
Even the effect you just described would not be defined as strobing, the exposure did not change, there was simply no motion blur to make the transitions of the water drops as they fell look less than hyper realistic. I have agreed many times 100%....higher shutter speeds definitely reduce or eliminate motion blur that is a well known fact, but as long as the exposure remains constant which it will when using daylight lighting, then strobing will not occur.
If people simply do not like the reduced motion blur of higher shutter speeds then sure, that is a good use case to use an ND filter to lower the shutter speed until the motion blur that is required is achieved, but to state that "strobing" as defined by rapid changes in exposure is caused by high shutter speeds is still a false statement when using daylight as the light source and this is why there are no reputable articles and no one can provide a single link to a reputable source that states flickering or strobing is caused by high shutter speeds; hyperrealism sure, possible camcorder look sure....strobing/flickering....no.