Hello @krnel,
I agree with you that there is no conclusive evidence on the effectiveness of the use of the mask. However, it is a reality in almost the entire world, the imposition of its use. There is such effective indoctrination by propaganda means that it affects the collective unconscious. In such a way, that if you do not use it, you will be condemned by your own neighbors and even denied access to establishments.
No está confirmada la efectividad pero ayuda a evitar el contagio. Es importante su uso
Yes, the problem is the justification that it's all backed by science, when it isn't... and ppl swallow it whole.