To most of you guys "plastic is plastic", that's all to it
But the truth is plastic is _more_ than mere plastic --- it is a combination of many types of chemicals, all mixed together to achieve the characteristics of the plastic that it needs to have
To see it another way, a plastic is like a steak. It is definitely _not_ only a piece of beef, but also the sauce (which itself is made of the starchy gravy - which can be broken up to other more basic components, - the flavoring [salt, sugar, spices, and so on]), plus the added chemicals, such as the aromatics (which is largely benzene group) that were formed when that beef was put over the fire
Same thing with plastics - it is not only the acrylic resins, but we also need to account for additives such as the plasticizers, color, elastomers, and so on, plus other chemicals that were produced as a by-product of the mixing of all those chemicals over a "heated process"
When we can eat steaks, the different bacteria inside our guts dissolve different ingredients from the steak that we have eaten
Bacteria are not like human beings - they do not have other bacteria in their guts !
Most often a type of bacterium may be able to digest a type of ingredient within a type of plastic, and that is all to it, which means, the other chemicals inside the plastic are still left intact, not dissolved, not digested, not broken down