I don't have a problem with the screwdriver being able to access computers and other technology--that's an extension of its function, to allow the Doctor to go places and do things that would otherwise be barred to him (the psychic paper is another side of this)--but when he can point it at anything and magically make it do whatever he needs, it gets ridiculous. Actually I think the real breaking point for me was when he was using the screwdriver to HEAL PEOPLE, which makes no sense at all. How hard would it have been for him to run into the TARDIS and pull out some Time Lord first aid kit?
Restricting the screwdriver to just a couple of functions also allows the writers to load up the Doctor with lots of fun steampunk technology, like the rear-view mirror that lets you see invisible things. The guys got a huge time-travelling Bag of Holding, why not let him take advantage of it?






