That’s a rather simplistic way of looking at it. The majority, as in 99.9%, of seismic events in AL, CA and NV were M3 or lower. Most were microtremors that can’t be detected except with the most sophisticated array of sensors.
Oklahoma on average experienced 50 seismic events per year pre 2009. Most are not even detectable by human sensory perceptions. After 2009, it went up to over 1,000 per year, with 300 - 600 in the range of M2s and M3s which can be felt my people. In 2011, Oklahoma experienced two 4.8 and one 5.7 magnitude seismic events, followed by a 4.5 in 2013, three 4.7s in 2015, five 4.7 to 5.8 in 2016, and two 4.6s in 2018.
We are entering uncharted territory right now. The Dallas Airport Fault is a perfect example. Seven years after they stopped pumping wastewater, and they still experienced seismic events along the fault line. Although the frequency has diminished considerably, the magnitude of the events remain the same.
The question is what happens once you reactivate a fault that had been dormant for millions of years? Does it go back to being dormant once you stop injecting the lubricating fluid? Your typical petroleum geologists would say “yes.” They know who buttered their breads. Your structural and forensic geologists would reserve judgement until more studies can be performed.