And yet there is no conclusive evidence that masks work. What they do do though is get thrown all over the streets and are a new filthy litter plague.
Just like there is no conclusive evidence that they don't prevent you from spreading it. that's the point. It's not to stop you from getting it.
Given how many people there are out there that don't wash up after themselves, who don't know the protocol on coughing and sneezing (even before covid) it's a safer preventive step to have everyone wear masks.
Scientists and experts don't always have to be 100% accurate. Given how viruses change and mutate it would be very hard to be.
What they know is how it spreads and the likely scenarios how it spreads. So if they think its better to wear one than not why should we argue.
Is your real reason why you won't wear one because of the litter potential problem then? Or do you want to go on record with another lame excuse why you cannot wear one or simply don't want to.
Any knacker that throws them on the ground kind of proves the experts right. The whole point that people are dirty and can be.
Sometimes we have to do stuff to basically protect ourselves from idiots and people who refuse to play ball. So as not to discriminate we all do it. It seems like a safer approach.