I'm not so sure that you're correct in all cases, although you do have a point of sorts. However, you need to consider the case where you are restoring to the same hardware and software base as was backed up (which most places would - or at least should - do as a matter of course anyway). The scenario would be a DR where a server has failed and you need to get it back now, rather than restoring from a legacy or historical backup (which I suspect is the one you are considering more).
Getting the data back is trivial. Getting the OS and it's configuration back can vary from relatively trivial to decidedly non-trivial. Getting a server application and it's configuration back is nearly always non-trivial. Full backups can save you in these situations.
What I'm saying is that any sane backup strategy should consider a lot more than just the restore procedure, but should also consider the hardware and software in the restored environment.