it’s a fundamental inefficiency that must be worked around with additional effort and resources
In the OP the use of the word "problem" rather than something like "challenge", and referring to the problem being the pricing structure (negative) makes it seem like we've switched topics slightly, but if you are just referring to the foundational inefficiency of energy distribution then yeah I agree it is definitely a challenge. However, that challenge need not be so overwhelming (even perhaps solely wrt pricing) that it negates the benefits of having that form of technology available altogether. e.g. if the power company itself, or each recipient building individually, had its own battery (if let's say those were cheap & sustainable) then that could work, without the users needing to care much. I forget which city but one example in Germany iirc pumps water up a mountain during the day, then at night or on a cloudy day that potential energy falling back down generates electricity again. So yes a "challenge" for sure but not necessarily an insurmountable one!:-)
Also, there are "problems"/"challenges" wrt use of fossil fuels as well, which have implications for climate change, and therefore even purely from a profit perspective there's government laws & subsidies and public perception that can affect it, which could push the overall net towards being beneficial to store that energy for later.
Every previous adoption of technology has taken - what, 50 years? - between having the technology and being set up to make use of it. Gasoline did not immediately have car engines to put into, nor kerosine a whole city's worth of lamps set up to receive them, etc.
Though at first, if fusion could power up the existing electrical grid then it could e.g. make electrical cars more efficient in the net/overall sense, even if vehicles operating directly on fusion power themselves would take many more years. So fusion really might be different than those that came before, if we are anticipating and more ready for it than previous technical advances?
Though yeah, it will have its own challenges e.g. the radioactive wastes, so fusion would not begin to replace greener energy approaches such as solar, wind, and geothermal, only perhaps supplement them.