String:Its not THAT difficult to do !. In my view a calm controlled ascent, still breathing and possibly making any needed stops is far far safer than just bolting to the surface from depth which is what CESA is.
The point is that PADI trains this order because they can see in the stats that it will create fewer casualties in the long run. What a particular diver does in a given situation is, of course, their call.
Don't forget that buddy breathing technique is *optional* at the PADI OW level (as it is in the renewed BSAC syllabus published a couple of years ago IIRC) and not everyone is trained to do it correctly.
And maybe a picky point but the CESA is intended to be be done in a controlled manner. "Bolting" isn't the right label for the technique if you ask me.
R..