How will Daylight make any difference if the visibility is poor? Isn't instrument flying done with reference to attitude?
but the iris opens full wide to gather maximum light to help you see provided you look at the PFD to see the attitude
In daylight, if you look out the side window (ok you can't see the wing tip) as you pull up for the loop you will have no doubt what your attitude is. However, here was a case of not keeping the G on over the top.