Because most of the Ladik modules are "primitives"...they consist of the submodule circuits that you'd find behind the panel of a much more complex device.
-- Lugia

Yes BUT, e.g. :
* Ladik dual attenuverter + offset = €50
* 2hp dual attenuverter (no offset) = €71
* ALM dual attenuverter + offset = €100
There are lots of similar examples! (Not to pick on 2hp or ALM, their prices are the same ballpark as most makers.)