Good article, but unfortunately it propagates the oft quoted "you eat a credit card worth of plastic each week" myth. Good video here explaining why it likely isn't true https://youtu.be/2Ntp6BqhSng
Given the studies on microplastics i.e. https://pubmed.ncbi.nlm.nih.gov/34484127/ I don't think it's necessary to minimize the situation. If anything it needs more attention.
If OP is correct that the quantity mentioned is an exaggeration, we should be open about that. Popular trust in science—especially in the domains of health and the environment—is extremely low lately and won't be helped by lying to people to try to get them to change their behavior.
(I don't know whether or not the number is correct, but OP isn't wrong to warn against exaggerating.)