Again I heard this said openly and near-CONSTANTLY early in the pandemic on NYC news .... not sure where you guys who somehow managed to miss it get your information but I'd look into making a change.
(or maybe scrape the wax out of your ears lol)
No, I only heard it being stated that that was the main reason, _after_ the change in advice over masks. Prior to that, though it might have been mentioned occasionally, the primary emphasis was all on how 'masks don't help' and 'only professionals know how to wear them properly'. Probably I could dredge up the BBC podcast from earlier in the pandemic, where they went into great detail about how useless masks were for non-medical-professionals (it was on the "Inside Health" podcast/Radio Four program).
Plus, once the advice changed, it was openly stated in more than one source that they said all that about masks being useless because they were worried about the shortage of masks for medical use. I even recall some explicit hand-wringing as to whether that was the right way to do it or if they should have just been open about wanting to preserve masks for medical professionals.