Is that a true assumption?
You are a great candidate for veneers. Filling don't create a barrier for veneers. However, I like to remove all of the old fillings from the teeth that I am working on before veneers, to make sure that there are no cavities under the old fillings and then proceed with the veneer preparation. You can have a great smile with porcelain veneers. Good luck.
You are a good candidate for veneers, and Fillings are not a barrier to veneers. Veneers can give you a prettier and sthetical form to your teeth and also can cover the fillings that yopu already have. You have to take care with dentist and the laboratories that they are working with. No everybody knows how to doit good.