This is incorrect. A T/W ratio by itself is meaningless since it ignores mass. The propellant mass fraction is what actually matters which takes into account t

This is incorrect. A T/W ratio by itself is meaningless since it ignores mass. The propellant mass fraction is what actually matters which takes into account the mass of the vehicle. The fact that the Raptor is more powerful than the Merlin is barely a consideration in the "Build the Starship out of steel discussion". They would have loved to not have to bite into their mass budget, but other engineering concerns triumphed.