You are argumenting with a fallacy.

The OP argumentation might be incomplete, but is at least solid argument for why we won't need a quantum operating system.

If you believe there is or could be a need for a quantum operating system, _explain why_. If you don't know, that's ok.

But arguing that "The OP argument cannot be correct because other people made incorrect predictions about other stuff in the past" is pointless and useless.

Maybe some application of quantum computing appears in the future that requires a quantum operating system, or maybe there is one such application that already exists today and we don't know about. I don't know of any, and like the OP I also think of Quantum Computers as "accelerators" (like GPUs, FPGAs, Xeon Phis, ...) for certain class of problems.