Well I'm talking about water specifically. In theory I agree that we can avoid things we know are harming us. But there is a balance to be struck between avoiding things out of an abundance of precaution and paranoia. Let's not forget that mental health issues including anxiety have skyrocketed the past few decades. At some point it has to be measured or else we wouldn't know its harmful. With microplastics and water, you need to know what comes out of your faucet (or whatever you are drinking). You can't just rely on some study analogous to those finding issues with eating teflon or using it on very high heat. And not drinking out of plastic cups seems firmly in baseless anxiety territory.