"Ban all plastics" is a strawman that will not happen and no mainstream opinion is suggesting. But there is a wide spectrum of possibilities between "ban all plastics" and "do nothing".

A principal concern is ingestion of microplastics via food packaging, utensils, cookware, etc. There are non-plastic substitutions available for many of these items, and a precautionary approach would be to regulate to require them, where it is economically feasible, until such time as the effects of microplastic ingestion are better understood.