@tropical : I am not sure who you are since you have not disclosed your identity , but that is fine , you must be somebody I know .
However, I am interested to understand whats wrong with the analysis . There are broadly two kind of backhands , broadly being the operative word here of course , , but setting aside those technicalities , there is one close to the table with the wrist as pivot and the one further from the table with the elbow as the pivot ....
Of course you cannot take on choppers with the shorter version , but I don't see anything wrong in that it could be done with the bigger version of the stroke , of course you need to have a very good backhand at your level to do it .. and it would depend on the choppers incoming spin ... but if somebody is using the below technique and practices it enough I don't see any issue ....
its just not common because, firstly , due to the faster rubbers and improvement in overall rubber technology , the other kind of backhand has become less common
secondly, we mostly watch techniques that are originated from the chinese, forehand oriented game . I am pretty sure if you get to see more footage of players from eastern europe / russia you would see more examples of people taking on choppers with their backhand ..
NL is on my ignore list so I didn't see his response until ttmonster quoted his. I know ttmonster personally and I am not that impressed with his analysis. I don't think NL can execute his back hand loop kill against players at his level. Giving examples of some exceptional back hand players to say this is the norm is so naive or inexperience. Taking a look at all videos with someone against choppers, we at least see >90% of players must use forehand to get through the chopping defense.