I have a slab foundation & have been told that because of that I cannot add a shower to my half bath in order to convert it into a full bath. Is that true?

I have a slab foundation & have been told that because of that I cannot add a shower to my half bath in order to convert it into a full bath. Is that true?
No! You will have to break up some slab to pipe the drainage but adding a shower can be a DIY project for a homeowner. Cheers, Tom