Removing Comfrey

I have a lot of the white comfrey seeding everywhere - and have the same problems digging it up. Since I can't dig it out I've learned to accept it and regard it as beneficial!
If you keep cutting the leaves (before it flowers) and using them as mulch its all good. Being in the middle of your veg plot means you can just scatter them around your veg without having to walk anywhere.

I'm still trying to dig out the comfrey that's in the wrong place but I leave it growing around the fruit bushes and trees. Cutting off the leaves and dropping them around the bushes feeds them.
Maybe plant in the comfrey patch instead of trying to dig it up?