Is that you bathroom? if he is talking about LVT directly over the ceramic tile that cannot be done. All the grout joints need to be filled and flattened. Also this will raise the floor level fairly considerably.

@millworkman! This is not my bathroom! This is LVT installed in bathroom!

It will definitely save money to install vinyl instead of tile, also easier to replace if you get sick of it. Won’t feel as expensive if you might be selling anytime soon