Yserbius123,
“Let’s get this straight: Wearing a mask is not a big deal.”
It may not be for you, but it is for others. And until you develop enough empathy to see that, you will have difficulty convincing them of the correctness of your position.
“It doesn’t restrict oxygen, nor increase CO2 levels.”
In some situations, it can.
“It doesn’t make it hard for people to hear you,”
Blatantly false. Widespread mask use has significantly exacerbated communication issues for people hard of hearing. Some masks with thicker layers do in fact block some sound, but a bigger issue is the inability to rely on lip reading and the facial components of ASL Many people with minor hearing loss who unconsciously rely on lip reading in louder settings have discovered their hearing loss issues due to this pandemic. Arguing that exacerbating hearing problems for some is necessary is perhaps a valid argument to make, but to dismiss the problem is heartless because then nobody will realize the need to mitigate such problems, and it undermines the validity of your argument.