[__blockcipher__]

I’ve already outlined in another comment why they could increase transmission.

They increase net volume of air exchanged, therefore all else equal they increase the release of aerosols. There’s furthermore a strong chance that they actively nebulize respiratory droplets into fine aerosols; ie they incresse the relative aerosolization and therefore the absolute aerosols.

They make convo partners stand closer together or speak louder.

They alter risk appraisal.

It is foolish to rule out any downsides. At best you’re advocating for a condom full of holes. At worse you’re advocating for a condom that magically worsens STI transmission.

[Emphere]

Nothing in our previous understanding suggests that they increase release of aerosols or aerosolization. Multiple previous studies have shown that they don't (see Asadi, S., Cappa, C.D., Barreda, S. et al. Efficacy of masks and face coverings in controlling outward aerosol particle emission from expiratory activities. Sci Rep 10, 15665 (2020), for one example; there's also older studies but you can look them up yourself).

The other arguments are of the "seatbelts cause more accidents" variety, which honestly aren't worth refuting. But I'll just note that social distancing has much weaker evidence of affecting virus transmission than even masks (there is no real justification for the 6 feet number and mostly unlikely it makes much of a difference). Hell, social distancing is even much more difficult to comply with than wearing masks so your argument makes no sense at all.