Not quite, I argue that the doping effect must be small a small part of the explanation, because everyone else, including many talented dopers, was slower.
In other threads, I argued, not that she wasn't fast, but that non-doping factors helped her run significantly faster.
We must look to other non-doping factors, like pacing and drafting and race conditions, and lately efficient shoes.
In other words, doping effect is a small part of the explanation of performance, because of these other significant non-doping factors.
Paula's performance can be clean or dirty, but no one has yet showed that doping matters in the marathon.