You are only addressing half the effectiveness of masks...the protection of the wearer. Far MORE effective and more important is the protection of OTHER PEOPLE from asymptomatic or “early effective” infectees “if” they also wear masks. Wearing or not wearing glasses affects the latter purpose not at all, and, in fact obviates the need for mask wearees to do so.
Your point as to protection against transmitting the virus can be achieved just as effectively with proper use of a handkerchief or a tissue. And because you think that no matter how you select, apply/fit test, wear and maintain a mask has no affect on its effectiveness as to acquiring the virus (though you seem to have implicitly acknowledge that without fitted goggles the mask-wearer is not protected), the mask-wearer is completely protected whether you wear a mask or not.
My point of all of this is not just to correct widely promoted fiction about the effectiveness of wearing face coverings (although wearing a scarf is not worth even a second of consideration), but to stress that the cost to society by everyone hiding their face -- their very identity -- in public, a practice as dehumanizing and as anti-social as is a burka in those oppressive countries of the Middle East, is not worth the infinitesimal benefit to be derived from improper mask-wearing. Cheers!