the matter that they are talking about is not some supposed fundamentally discrete indivisible subatomic particle
all particles can be expressed in terms of the wave function. the deeper you look ,the more wave-like existence is.
this is abhorrent to a substantial aggregate deluded illusory human self hence the opposition
when we take a good look at what we generally consider to be the self, it's not that flash.
many mystics recommend to practice dying before dying
when i first heard of emptiness, i reacted with internal hostility. space, emptiness and unity, may seem boring or even scary, but that is just a conditioned projection that arises from ignorance.