What does "blinker down" mean?
to blinker TFD
to put blinkers on; to obscure with or as if with blinkers; Having or showing a narrow or limited outlook or point of view. ‘a blinkered attitude’
"I'm truly sorry but I can't blinker myself that far down"
Meaning:
I cannot ignore, blind myself to this fact, be so myopic, ignore, look away and/or down.
Etymology: in the figurative sense, 1849, from horses wearing blinkers to limit the range of their vision (see blinker). etymonline