It certainly is better for the environment not having to malt, that's not merely a claim. Malting requires a large energy input over several days followed by more demanding storage requirements.
Malting is not really a natural process. The only part that is natural is the barley beginning to germinate, but stopping that germination to keep the modified endosperm and kilning it to develop a range of different malts is not something that would happen without the intervention of maltsters.
You can't infer that these lab made chemicals are inherently bad simply because they are lab made. Consider how intensilvely yeast has been researched, and its impact on alcohol production improved, due to lab work. The enzymes which are lab produced are no different to any other enzymes. The only part I would be worried about is the effect on the finished product, but then again if the barley beers aren't good I know I can always choose malt beers. Nonetheless, interesting science.