If, like my idiot <unnamed family member>, you insist on having highly polished gloss tiles then yes, they will be a death trap.
On the other hand, normal people buy tiles marked as suitable for a bathroom, which have some measure of grip. If you go to a tile shop, they can show you which ones are rated for bathrooms, and you can decide what extreme you want to go to.
At one end some are like swimming pool tiles, very scratchy but safe, at the other are the high gloss ones my <unnamed family member> got, did I mention he was an idiot? Some ranges even come with a 1-5 type rating for non-slippyness (official technical term).