Agreed TSMC can do whatever they want. in 2027 no other fabs will match what tsmc has today, anything that requires the latest process node is going to get more expensive, so your apple silicone and your AMD chips
They are always balls deep, if it takes them 2 years to get a TSMC yield, with as much as demand it exists for high-end fabs, they could already easily get financing to already build even more capacity.
Now they have literally the US government as an investor.
One would be naive to believe that they wouldn't get at least a few hundred billion dollars to scale it up given the so many risks involved in most of US tech sector being dependent on Taiwan.