Dont forget many of the airports with these approaches in the UK have no radar so obvioulsy you are not going to get vectors.
Utter Rubbish! Why would you want to fly an instrument (in this case GPS) approach to begin with? Above/in cloud? Night? You'd be very brave not to receive a radar service, especially if the airport hasn't been granted a class D CTR; procedural control could be exercised without Radar in this sense. Try explaining to your passengers how else can you be separated from other aircraft, known or unknown, or sequenced in the landing pattern?
The notes on the chart at the Supplement for Blackpool above, states that the missed approach
shall become a conventional procedure on reaching 2000ft. Is it sensible suggestion that GPS procedures are still relatively new and therefore incomplete? Maybe that's rubbish too.