An SP who openly offers bareback to strangers, selectively or indiscriminately, as reported by a number of different individuals, is clearly more likely to be barebacking multiple people than one who doesn't suggest bareback to her clients. You can argue individual cases of "oh she only works part-time and shags like a bunny privately" or "she only works part-time and is otherwise celibate" or "she's so ugly she has to offer BB" or "she's so fit I'd BB her as an exception", but all other considerations being equal, two equally promiscuous SPs with differing approaches to their selection of bareback partners present different risk profiles (you can fantasize as much as you like about how discerning or indiscrete her private life BB partner(s) are).
Just because Benj considers all SPs to be infected does not make it certain, just because he assumes every SP barebacks with some clients doesn't make it true, just because he assumes that every punter lies about not barebacking SPs ever doesn't make that true, he is simply assuming his risk landscape to operate in. Despite these assumptions he still kisses SPs and engages in RO and OWO and does so with SPs he recognises to be drug users.
Others who do not engage in kissing, OWO or RO with the same SPs as him are taking less absolute risk than he is.
Those who choose not to see SPs who are known BBers (advertised or not) are taking less absolute risk than those punters who do see them and engage in any unsafe contact. Helping punters, of all persuasions, make informed decisions is what this site is about so outing this particular SP is absolutely in the interests of UKP.