It's nonsense to say that there's no way to make a perfect representation that's not imbued with personal style.
Many mediocre contemporary realist painters achieve this all the time, as you might expect from the definition of the problem as a case of exact replication of reality.
Of course, subject, setting, framing, lighting etc. all distinguish their work but only incidentally. Not conceptually.
The impact of photography and the increasingly boring trajectory of figurative painting are the reason that art has moved away from valuing imitative skill and talent/facility. As art forgers know, a personal style or flick or the painter's wrist is almost always an easily reproduced or pastiched affectation.
I feel like the ghost of PG as painter is hanging over this discussion, dooming any endorsement of the developments in art since WWII...