My experience has been very different. The fingers have so many nerve endings that they stay sensetive longer than anything else when the threat is under the influence. When you base out properly, the only way to "fight thru that pain and continue on" involves breaking one's own fingers. I haven't run into a threat that dedicated yet, but I don't imagine the torn ends of the tendons twisting around under the skin would bring a big lessening of pain
. In a dojo where you are reasonably certain your opponent has no interest in crippling you it is much easier to tough it out.