Dead easy to say when you are on the ground, but loss of a vacuum pump on a CAVOK day should be a non-event.
However, when faced with any problem, its bound to take up some or all of your spare mental capacity, so any help you can get from any source can only be beneficial.
If you read the quarterly safety bulletins you'll see loads of MOR's filed for airspace busts but the recent CAA prosecutions (AFAICR) were only for only 2 or 3 of the most serious busts, so I wouldn't worry unduly on that score.