Plastics certainly is one of the most useful materials known to humans. It is incredibly versatile and cheap.
Any area of life has been significantly effected by the use of plastics as a material. I think articles like this are laughable, the plastic use of individuals in their daily lives is just a tiny, tiny peak of the iceberg. Beneath there sits an industrial society which could not exist without it. No, you can not live "plastic free".
The first and most important questions these people have to ask is: how do you make anything without plastics?