People more often say that to save face by implying the issue you identified would be reasonable for the author to miss because it's subtle or tricky or whatever. It's often a proxy for embarrassment
When mature, funtional adults say it, the read is "wow, I would have missed that, good job, you did better than me".
Reading embarrassment into that is extremely childish and disrespectful.
When mature, funtional adults say it, the read is "wow, I would have missed that, good job, you did better than me".
Reading embarrassment into that is extremely childish and disrespectful.