This is a really silly objection to have for years!
The problem is like trying to describe color to someone who is blind. How can the sky and ice both be blue? How can the ocean have a color but water doesn’t? It makes no sense! (link)
But rather than a birth defect, it’s like there’s a place a person can go to where all of a sudden they will be able to see, and then see for themselves what ice and the ocean and water look like. But then someone objects and says they don’t want to go and see for themselves because they don’t like the descriptions!!
It is resolved simply: just experience it for yourself what is being discussed! And then you can come up with a better way to describe it with your own words.
What I will say is once you do clearly experience it, you will see why the description makes sense 
. But then you will be in a perfect position to explain this to other people who might have the same objection as you.
My shot at it (I never had this objection so I can’t directly relate): the stillness of infinitude refers to the fact that time does not move in actuality. Time exists, but does not move (same as space). Time is the vast, still arena, within which everything happens. Apperceiving this is truly breathtaking and remarkable. The nature of this stillness is that it is perfect – this is also due to the fact that there is nothing ‘outside’ of it, it has no peer, no opposite, hence perfect. And the quality of this perfection is that it is pure. This scintillating purity is intrinsic to the stillness. And this purity is palpable, ever-present, and… it streams! Haha. It does stream. Don’t know how else to put it. It can be apperceived as more or less, it can come in bursts. It has a dynamic quality to it. Actually free people also experience it in varying degrees. So it’s not some inert thing, it is dynamic.
Not sure if it helps, I don’t know ‘why’ it streams per se, just that it does. The sky is blue and so is the pool water, although a cup of water is transparent .
Cheers,
Claudiu