Yeah, you're right. I mean, anyone who can follow basic instructions is part of the field, just like a 15 years old editing a WordPress config file is a Computer Engineer, right?
In all seriousness, there is a big difference between doing lab work, which can absolutely be done by high schoolers, and skilled, technical work in the biological / chemical fields. As pa5tabear said, there just aren't as many jobs out there for the skilled biologists or chemists, which is one reason you can usually see people with degrees doing jobs which they are "overqualified" for.
In all seriousness, there is a big difference between doing lab work, which can absolutely be done by high schoolers, and skilled, technical work in the biological / chemical fields. As pa5tabear said, there just aren't as many jobs out there for the skilled biologists or chemists, which is one reason you can usually see people with degrees doing jobs which they are "overqualified" for.