Not only PAs are way too trigger-happy with a blade, but the main problem is that their biopsies are much more likely to be nondiagnostic, and may prompt further work-up. This is how it works:
PA takes 3-6 biopsies of random stuff. Writes 'R/o malignancy' or 'nub' on everything (no pun intended). The biopsies tend to be small, superficial, fragmented and squished. Therefore oftentimes the final report includes some sort of hedge, like, 'deeper biopsy recomended', SCC cannot be ruled out etc. Which engenders a new visit, which generates more biopsies, billing etc. Oh and it also quadruples my work.
Yes it's very hard to escape the impression that the big derm mills do this for $$$.