She's obviously wrong to think bees aren't extremely important, but she's technically correct that they are an invasive species. However, if you're bothered by this the correct action is to support native pollinators like the [Blue Mason Bee](https://en.m.wikipedia.org/wiki/Osmia_lignaria). You can even [make houses for them](https://www.nwf.org/Garden-for-Wildlife/Young/Build-a-Bee-House)!