Also, that argument only applies to PoW coins, not PoS coins.
PoS - proof of stake, https://en.m.wikipedia.org/wiki/Proof_of_stake
Climate change, opioid addiction, police murders, genocide in China, microplastics, childhood obesity, #metoo, whatever other thing.
That's just how society works. There are a billion different things happening every day, at any given moment some are gaining attention and some are losing attention. Everybody will care about the most popular one for a while, some laws might get passed or someone might go to jail or get elected or give a speech, and then it'll fade from the mainstream news and daily conversation will move on to the next issue.
This isn't some coordinated conspiracy, this is the pattern of how literally every issue ebbs and flows in attention.
It is basically a self organising system around a very small pool of original thoughts. It is pretty remarkable how stuff can completely slip the general discourse because it never catches on in the in-group.