Not even close. Returning is all about rhythm. The net cord completely screws that up. Ask any receiver if they'd rather play or replay lets and they will tell you the latter.
imo very often the rule will allow to count serves which are just a little bit slown down without being really deviated, then I think it's better for the receiver.
Ps : I really think this thread should be merged, there should be one thread about that rule because there will necessarily be threads about that from time to time without any connection with Heilbronn.