Is grout required when installing luxury vinyl tile flooring?
I installed LVT a couple years ago in a rehab center. 2 bedrooms and a 2000 sq foot dining room. The product interlocks very tightly. It's pretty easy to install because it cuts with a utility knife. I think if I were to put it in a bathroom I would just clear-caulk it along the baseboard.  The interlocking joints are tight if installed correctly. I would only not use it if the manufacturer advised against using it in such an environment.