Safer than what?
Thousands of lines of text, but no one has answered, fully, the original question - only assumed the intent of the questioner and commented accordingly.
If the answer isn't an unreserved 'yes', then the flying training, regulation and revalidation system has failed miserably.
In my opinion it would fail if ALL pilots, with those particular qualifications were tested in the real world to the limits of the ratings in an 'instrument' environment.
In all cases when I have demonstrated to an IMC rated pilot an instrument approach 'for real' it has proved beyond their capabilities - and understandably so.
The 'safety' element is maintained by a more controlled operating environment and the greater understanding by the pilot of his or her limitations and those of the aircraft and systems.
Erode pilot judgement, aircraft capability or systems and the potential for a less safe operation is paramount.
The answer, I suppose, is there is no answer except that evidenced by the flight safety statistics, which in themselves are not conclusive.
KR
FOK
PS: Any reference to aerobatics or other applications of flying skill in this context seems absurd?!