I feel quite certain that I haven't, I just think the point is poorly made and I've spoken specifically to why I think that to be the case. You can get all the recommendations and referrals you want for an infosec professional; nothing stops that person from holding themselves out to be such a professional, quality of work or competency performing it notwithstanding.
You can absolutely suck as a pentester, but still legally hold yourself out to be one and advertise yourself as one to anyone who will hire you.
You can NOT do the same, holding yourself as an attorney or a doctor without very real risk of legal action if you are in fact-not licensed to do either. There are bar associations and medical boards governing various aspects of their work, and how their work is conducted, performs ethics and competency investigations on license holders, and can take away their license to continue working in such capacity if said investigations deem fit. No such governing board or ethical board exists for infosec professionals.
That is a pretty important difference that shouldn't be ignored just to make a petty point about how easy is is to ask for a referral.
Just because there are consequences doesn't mean it doesn't happen.
Which is only supplemental to all of this. My entire point is that it happens, and the prudent do the diligence to make sure it doesn't.