Right, I never claimed that they're entirely ineffective. My point is that some states do not have mandatory mask requirements, and so let's say someone sneezes and/or coughs without a face covering but you have one on, the particles will get through the fabric when you inhale (especially loose fitting or improperly worn ones). Now in states like NJ, NY, etc. that make everyone wear a mask, it is somewhat better because now "spittle" is contained, and each person has a barrier up as opposed to just one.
Ultimately, in a perfect world, we would all need to have medical grade N95 masks and actually pay attention to how we handle our PPE. I see people all the time with a mask in their hand as they grab the handle of a shopping cart or open a door. Now imagine all the germs, besides COVID, that are on those surfaces, being introduced to your face.