This is faulty advice.
Having a PhD makes life THAT much easier if you applied to integrated plastics programs, esp. if your other records are marginal. If you want to be a plastic surgeon and academically bent, I would start by doing a PhD in plastics related field, such as tissue engineering or biomechanics. Try to sell yourself as committed to an academic career during residency application. Once you are in, you can carve out your career however you want.
Suppose you have a 220 Step I, no PhD, average grades, what's your chance of landing a position in integrated plastics? 10%. The same applicant with a PhD and a few abstract and a paper in tissue engineering? I'd say 80-90%. Just read the report. If you are that committed to plastic surgery, spending 3-4 years doing research might not be such a bad idea.