There are already companies making huge, expensive, high-performance chips for x86 and ARM; chips which are operating at the limit of what's physically possible. There aren't chips which do that for RISC-V to my knowledge.
I don't see how that changes things. The end goal is the same. x86 and Arm are much further along, but that doesn't mean they "need" better lithography any more or less than RISC-V "needs" it.
