Not a myth, perhaps I was overly general with 'we die' but large portions of us would.
Bees are a rather vital link in the ecosystem right now, and there are not many species that could replace them quickly enough to avoid an ecosystem crash in temperate climates. We would lose a large proportion of our food crops, and significant biodiversity. The resulting pressure for resources would inevitably lead to conflict. We can engineer crops, but there would certainly be an ecosystem crash, bees are currently irreplaceable in the temperate ecosystem. Humanity may survive it, but it would be a