it might be a combination of the things , I do know some folks that just wont ask no matter what or take advice either .
but I also know some that have hearing issues too . then there are some that have listening issues as well .
I imagine if he stayed busy at the lake like he was doing he ended up getting into them at some point .
when I went to the north end of the lake later the bite up that way was better than the south end where I saw him .
of course some times there are those days when even if you do everything the other fella is doing the darn crappie still wont cooperate .
been there and done that many a times myself