This is why:
Yes, if you throw tulip bulbs out when you empty pots, it is the equivalent of planting them, and some months later, up they come.
This is exactly the same reason why we don't put roots of couch-grass, ground elder, bindweed etc on the compost: burn them! Or put in them your brown bins (or whatever colour your local council choose to use for garden waste paid collection). Or spread them out in the sun to dry for several days before composting - assuming, that is, that we ever get several consecutive days of sun, ever again...
But on the compost heap? No!!