Silvaire
We are in the business of major damage repair to composite airframes, this is the sort of job that can't be done by an individual due to the complexity of the repair and the equipment required to do the job.
With the Cirrus range of aircraft becoming very popular in Europe and a lot of them staying on the American register it is advantageous to have the EASA 145 / FAR 145 crossover when it comes to major repair work as I doubt that Cirrus or any other manufacturer would offer technical cooperation to individuals who are unlikely to have the facilities to properly carry out such work.
I have no doubt that for the normal day to day maintenance you are correct but that is not were I see the advantages in all of this.