Can degenerative disc disease be helped by fusion really?

I have a lot of things wrong with my spine including DDD, stenosis and spondylosis. The spondylosis is not that big a grade only grade one. However many surgeons have told me I need fusion but then my pain management doctor who's European and doesn't have as anything invested in doing surgery thinks that degenerative disc disease can't really be helped by fusion and in particular my case. Has anyone had help from getting fusion for symptoms and their legs from DDD or stenosis? I don't have symptoms in my back only my legs. My legs throb. Thanks for any information.