You're making a silly point. There are not legal substitutes for paying taxes (inb4 loopholes for wealthy and corporations), while there are plenty of more affordable substitutes for Apple products.
What are the affordable substitutes for the M2 Ultra?
If there are no substitutes, a high price is extremely justified.
I get that lack of competition explains the price, but I don't think that means it's justified.
If there is no competition (substitute, for given use cases and/or customers) and customers are willing to pay for it, then that is pretty much the definition of its being justified.
Or a monopolist is buying up all the limited supply of that semiconductor tech, so no one can compete.