There has always been two competing ideas about music. It seems like the wealthy has always thought that making music should be expensive and is a waste of resources for the lower classes; and only the finest instruments are worth having.
And the lower classes thumbed their noses at the rich and played music by any means necessary: building instruments out of found materials, buying crappy instruments that the wealthy turn their noses up at, designing folk instruments that can be made by members of the community that don’t even pretend to be other types of instruments, and so on. And often incorporating the byproducts of these decisions into their musical styles.
I mean, you’re probably thinking I’m meaning the music of the streets like rap, hip-hop, found percussion, and stuff like that. And you’re darn right I am. Those are fine, valid musical expressions. But I’m also meaning rock and roll, metal, bluegrass, country, jazz, folk, folk metal, Tibetan throat metal, Mongolian Rap, and basically everything except classical orchestra music. (Although, I mean; there isn’t much more metal than composing an orchestra which has a artillery component.)
Plastic instruments is the next wave in getting instruments into the hands of people who couldn’t have instruments before. It’s a thing to be celebrated. A lot of people need that spark to figure out how they can make music on their own and an inexpensive instrument can be that spark. In some ways we are in an environment right now that discourages people from making music recreationally; our culture is starting to push people to either being a professional musician or not making music at all, but making music is a fundamental human need; so anything like this that helps people get going is great!
Besides, every ounce of carbon in a plastic instrument that gets played and loved until it is no longer playable then thrown away and buried in a landfill is an ounce of carbon that doesn’t get put into the air… (And I imagine that a lot of the parts and components of the plastic instruments will be plundered for folk instruments before it gets thrown away.)
(Full disclosure: I own a plastic guitar that is horrible and doesn’t get played, a plastic djembe drum which is wonderful and gets played as much or more than my traditional djembes, and a ton of other instruments, most of which are made out of wood.)