I disagree slightly here. People have awakenings that spur them to involvement; I've seen that in my own life.
But I think they can become selectively blind to certain things as soon as they think they've won, or when the lies become essential to their own self-image of being on the right side. Since 9/11 is the obvious example today, I'll mention that nearly all of my high school classmates who spent their early adulthood protesting Bush and the Iraq war, and the corrupt intelligence agencies magically had a switch flipped in their brain the second Obama won. Then came Trump, and that was the last nail in the coffin to any skepticism they had towards the government, once those same intelligence agencies were validating them daily that Orange Man was indeed Bad. We're seeing the fallout of that now during the pandemic.
They used to care and question, but stopped doing so when it was convenient.
Now in present, and in the short term, I tend to agree with you. More people who previously ignored politics finally have something to latch on to. But there is a need to keep that momentum going. The same people who protested children in cages in December were more than willing to defend it by the end of January. Then again, I think there is a difference between someone who rallies around a cause due to social pressures and personal convenience and someone who does the research because something truly begins to bother them. I do know people who dug deeply into Trump's immigration policies who were still furious when Biden made it worse on every level.