A: because it could be argued that in terms of detecting God we have a sense that detects God and/ or we are an instrument.
Oh deary me - we're not heading down the road of the
sensus divinitatis bullshit beloved of William Lane Craig are we Vlad?
Any argument that we don't all detect God can be rebuffed by God choosing who he reveals himself to or by a failure of detection ability or function which suggests repair by the engineer......I.e God.
No, it can't be rebuffed at all. Why? Easy. Because it's a monumental exercise in question begging (in the true sense of the phrase; circular reasoning or
petitio principii if you prefer) in that it's assuming the existence of a god without demonstration or methodology and then conjuring feeble, entirely
ad hoc excuses out of thin air as to why some people don't have that alleged entity revealed to them by the entity whose existence hasn't been established in the first place.
A god stands in need of demonstration to be taken seriously as a viable part of the discussion, not merely assumed and everything proceeding from thereon.