There are no established health effects of microplastics. There are magnitudes worse health problems in e.g. both under and overnutrition that cause a lot less panic and fuss.
https://www.undp.org/kosovo/blog/microplastics-human-health-...
It'd be more true to say, "There are no established significant health effects of microplastics on humans." FWIW, the article you linked to doesn't say "no effects", but "limited evidence for significant adverse health impacts".
This seems concerning: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9885170/
Micro plastics is like CO2. Spread out everywhere, can't be sequestered or reversed.
Rather than saying it's not a problem now — it's worth saying what's the threshold beyond which health complications begin (that number can't be infinity), and based on current growth levels how far we're off from it. If that's like at current rate of growth we still have 5000 years, then yeah I would agree with you and ignore the news. But just saying retrogressively that there is no conclusive evidence based on what we're eating so far – unfortunately sounds only politically correct, without considering the spirit of doing science (exploring the horizons / where the limits are).
You might call it panic to minimize it, and you'd be right to do so if we here were in charge of nutrition for a population; but I'm guessing most of us are in charge of our own nutrition and maybe a family's, so the information to deal with that is pretty valuable.
An equally true statement is that there is no established safe concentration of microplastics in tissue.