IO540, you would be surprised as to how narrow a view of CAT you have limited yourself to
There is no point trying set you straight as that is besides the point, suffice to say that airline ops cover a broad range of operational challenges that most GA pilots would be unlikely to be subjected to.
Therefore the notion and elements of SA are identical for CAT as they are for
GA. What is different between the two is the the specific operation of the aircraft and the potential immediate ramifications of lack of SA and probable subsequent error. For example miscalculating track miles to run could be significant for a medium jet, but probably not for a piston prop. Icing would be significant for a piston prop but probably not for a medium jet.
On the whole though, I would surmise that the potential SA traps and pitfalls would be similar between the two camps.