Is the real problem that PCPs are reluctant to switch patients from a long prescribed product.../
That's an impediment to the uptake of FoBs for chronic diseases, but it's not the main impediment, IMO. Rather, the main impediment is the subject of PFE's lawsuit: the branded-drug companies' use of exclusionary contracts with PBMs and third-party payers to try to shut FoBs out of the market.
“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”