Of course you can still study plants and make medicines. That's exactly what your indigenous people supposedly did in the past, didn't they? And if they did it

Of course you can still study plants and make medicines. That's exactly what your indigenous people supposedly did in the past, didn't they? And if they did it then there's absolutely no reason to think that modern pharma can't produce the same knowledge. And the whole assumption that there is a body of invaluable knowledge somewhere, held by indigenous people but somehow unavailable to modern science is very strange.