Maybe, but all sorts of things could have long term effects. Even without plastic, the environment is full of toxic or non-digestible things, like dust, or poll

Maybe, but all sorts of things could have long term effects. Even without plastic, the environment is full of toxic or non-digestible things, like dust, or pollen. Many organisms don't want to be eaten and shed particles that evolve to be non-digestible. If you worry too much about what MAY be dangerous, you couldn't leave the bed anymore. Remaining in bed is definitely dangerous. Not drinking water is also definitely dangerous.