Yep, not cost effective to steal the LPL's $75 bike, but steal a Madone or Dogma F10 at the cost of one or two sets of replaceable bolt cutter jaws? Even at fencing value that economic exchange would be well into the black for the thief.
The hydraulic cutters have the advantages that, unlike 49" manual cutters, you can put them under a hoodie and you don't have to weigh 24 stone to create the necessary force.
Nobody riding a madone or dogma f10 is likely to be carrying around a 6+ lb chain anyway, so thats kind of a moot point. IMO a cordless angle grinder is more of a guarantee against all types of locks and chains anyway, for the same or less money compared to a hydraulic cutter.