I thought so at first too, but then I realized that wasn't what Luke, or the film, was implying. The "balance" of the Force, stated by George Lucas, is when the light side reigns and the Force is allowed to do as it pleases. The Dark Side enslaves the Force for selfish gains, leaving to an imbalance. That's the main difference between the light side and the dark side. Thus was established in Empire Strikes Back and the films have followed it ever since.
The Force, however, has a will, and as such it willed Rey to gain her powers since Kylo was a HUGE disruption to the Force. Hence why she can suddenly use it effectively. "Darkness rises, and light to meet it", as Snoke said. When we saw the life and death on screen, I don't think it was implying the dark and light side; rather, we saw the nature of the Force and how it affects living things.
Luke even says there was balance before Kylo Ren rose to the dark side, implying that the light side IS proper balance to the Force, as per tradition set up by Lucas.