Ah so of course that must mean that these scientists are wrong!
Plastic bottles are made using PET or PETG and it is one of the few plastics that are easily recycled. Most plastics however are not. And just because people are using plastic they found to make custom products does not mean the plastic itself is recyclable. It needs to be recyclable on a large scale where it can be reused in large scale industries to not have a negative impact on the environment.
Well, it sounds like they knew where it was the whole time at least.