I think that is a little harsh.
I don't. My office is one of several in a technical park. Whenever BT (or one of their trusted outsource providers) arrive on site, terror sweeps through all techies.
In the past couple of years they've:
1) Disconnected live pairs and reused them for someone else.
2) Completely failed to find the pair they've jumpered in the cabinet down the road anywhere in our building (probably cut off some innocent house instead).
3) Taken four visits to just install a single analogue phone line.
4) Terminated ADSL services for the wrong company, and then insisted a new order (plus 6 week wait) would be required to turn it back on again (I believe an engineer's van was actually blocked in the car-park until that was resolved - impressively within a couple of hours).
And these are just the ones I hear about!
They really *do* have one job to do... Provide a telecoms service... And they're shockingly bad at it.
I'm almost glad we have a direct fibre onto Virgin, although that has its own horror stories.