I disagree.
My uncle flew F100s active combat in Vietnam.
We discussed at great length how he marked up his plane to rocket and level bomb the enemy without a bomb sight from various altitudes.
He also helped develop other special techniques for ordnance delivery through the air, including nuclear.
My uncle went to the bomb range and practiced to get it right. He also shared his data with other pilots so they could do the same.
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And Kudos to your uncle and his practice.
Scariest close air support I ever was an intimate participant in was with F100s
Watching them turn in, lined up with you and come screaming in very low
dropping a MK82 500lber and watching the speed retard fins snap out until
it looks like a little girls metal jack from a game of 'jacks' as it slow motion
tumbles towards you. You just know it's only feet over your head as passes
over and hits about 300 feet away. The shockwave washes over you, the ground bucks
under you and you see bomb casing going hundreds of feet in the air and you
know it has to come down so you just go fetal to make yourself as small as possible.
I look back on that and am so very glad pilots like your
Uncle practiced and practiced.