Gary Player is just saying what he believes is important in the golf swing after 60 years playing golf at a very high level. He doesn't like being laid-off at the top, likes a little stronger grip, likes the left thumb more under the shaft at the top, likes a good weight shift and full follow thru onto your left side and likes acceleration thru every shot. WOW, pretty radical stuff.
He gave his opinion on some very good player's swings he's seen in person in his lifetime. This our way or the highway and we know it all about the golf swing and everyone who disagress with us is stupid attitude is, well stupid. That's my opinion anyway.
I enjoy seeing these great players and their thoughts about the swing. I liked Lanny Wadkins, Larry Nelson's and Tom Leyman's also.
If you want to get your golf info from only one place, then I suggest keep the blinders on and don't look at anything else except this forum.