My cat makes a huge mess and will piss on anything on the floor that isn't his litter box. Door mat, shower mat, any dropped laundry, a mat next to the litter box for trapping the litter. Weirdly he's perfectly fine with furniture and carpet. Anything loose that he can sit on? Piss. Ruined the hard wood floor in a rental closet once because I didn't realise he was going on the mat and it was trapped between the mat and the floor, turned the wood solid black. If nothing is on the floor when he needs to pee? Perfectly capable and more than happy to use his litter box.
Now the main bathroom is his. The litter box is in the shower so we can contain it and just rinse the shower out when he's kicked enough litter out. It also reeks because he will bury his piss but not his turds so they just sit on top of the litter. It's so bad we just don't use the bathroom anymore except to clean up behind him. We're just happy he contains it to one room if we pick up after ourselves.