This can be confusing.

Firstly, there are different ways of swinging a golf club. Some tour player delay their wrist action using the so-called one-piece take-away. If a player tries an early cup or cock, the club can go way inside causing an over the top swing or some other bad result.

I would think that many players would not know the difference between cupping and cocking. Devices are sold to maintain a straight left wrist (RH player), so presumably the left wrist does not cup. The RH wrist does cup fully. The cocking action is presumably the movement of teh wrist that takes place at 90 degrees to teh cupping action.

I am sure that this is all very clear to some

I have read the stuff on the Golf machine sites (Manzella, Crocker) - they get into cupping an cocking and takeaway in some detail. But even they distinguish between diferent types of swings - Hitting vs Swinging for example.

I change my swing at least once or twice a year, but when I look back at videos we have taken over the years, the swing always looks the same
I have decided to do the best I can with what I've got. If I can cut 3 or 4 puts out of each game and get up and down 75% of the time, I will be a scratch golfer. Not likely, but easier to work on!