Not sure why he recommended using a plcc pullern (which is correct for socketed PLCC chips - even though this Can be done with a screwdriver if you are foolish) and not recommending an ic puller instead of a screwdriver for the other chips..
If you are careful you can get away with a screwdriver on a DIP chip a couple of times before the legs bend so much they break. Then you end up soldering new legs on or replacing the chip. It's not that hard to fix your mistake.
With PLCC it's different. The force you put on the socket causes it to crack and replacing a PLCC socket on a board is a very long and boring task. That is speaking from experience when I was young and thought that a PLCC puller was too expensive and a screwdriver would do :-)
