Propduffer
It seems to me that any pilot who has flown gliders in the past would just smile ear to ear (and maybe even throw the plane into a sharp turn so as to not lose the updraft)
Not sure anyone would be "smiling ear to ear" faced with the still unknown situation QZ8501 was in...
Furthermore I don't believe the Captain lacked in flying ability...I feel his experience flying fighter jets would attest to this...
Blind speculation is just that at this point... for all we know the Captain went to the toilet and all hell broke loose...it has happened before...