There is currently no particular reason to think that the experience is never going to be quantifiable in physical terms. You are assuming that consciousness and perception must somehow transcend the purely physical. You have nothing to support this assumption. You may be right, but you may not. At the moment we simply don't know.
Given the advances we have made in understanding brain function and how purely chemical factors affect perception, who knows where the limits are?
This needs emphasising considering how often intelligent people assert such claims akin to the pious who presumed similarly only to have scientific progress shatter their narrow worldview.
Sometimes you can cut them some slack considering how astoundingly unfathomable and awesome these scientific discveries happen to be. Plus we're so thirsty for knowledge that sometimes current limitations are frustrating. But that's still no excuse for pretending to know more than one does.