It’s just so silly though. You’re dismissing the uncountable number of people absorbing unknowable amounts of micro plastics over the next few decades as unimportant.
Not only do we want to reduce exposure in the near term, we may find a way to effectively remove micro plastics from the environment in the future, so no, it’s not settled that releasing as many micro plastics as possible is fine as long as it would happen eventually anyhow