Yesterday, I asked a question about the square-cube law and propellant tanks.
I have a very similar question about TPS tiles. Does the mass ratio of TPS tiles improve in larger constructions? I mean, is the weight of the TPS divided by the mass of the whole construction better in larger ships, or do larger ships require thicker tiles, resulting in linear growth?
Starship, someday, will transport humans, so it will be much heavier when reentering the atmosphere (life support etc). Therefore, it will need to withstand much more heat. SpaceX doesn't have a different TPS design for these scenarios.