You're arguing against Tokamak fusion. But what about, say, HiPER? Looks to me to be a much more comercializeable approach, yet it's still "mainstream" fusion, just a slight variant on inertial confinement ala NIF to make it much smaller / cheaper / easier to have a high repeat rate (smaller compression pulse + heating pulse rather than a NIF-style super-massive compression pulse). The only really unstudied physics aspect is how the heating pulse will interact with the highly compressed matter; NIF and pals have pretty much worked out the details of how laser compression works out. Beyond this, pretty much everything else is just engineering challenges for commercialization, such as high repeat rate lasers, high-rate hohlraum injection and targeting, etc.
I've often thought (different topic) about how one can get half or more of fusion's advantages via fission if you change the game around a bit. Fusion is promoted on being passively safe (it's very hard to keep the reaction *going*, it really wants to stop at all times), it leads to abundant fuel supplies, and there's little radioactive waste (no long-term waste). But what about subcritical fission reactors? Aka, a natural uranium or thorium fuel target being bombarded with a spallation neutron source. Without the spallation neutrons, there's just not enough neutrons for the reaction, so the second the beam gets shut off, the reactor shuts down, regardless of what else is going on. It'd be a fast reactor, aka a breeder, aka, your available fuel supplies increase by orders of magnitude. And your long-term waste would be much, much less in a well-designed reactor. Spallation neutron sources have long been proposed as a way to eliminate long-lived nuclear waste by transmuting it into shorter-lived elements.