The argument is that anchoring your consensus to something artificial, completely misses the point of PoW and diminishes the incentives for decentralization.
Discussion
How? Everyone is using the same algo with RandomX and proving they solved it. You can't fake it and that's what matters for PoW. It's anchored to the real world.
SHA256 algo is just as artificial and arbitrarily chosen, so I hope you aren't making some kind of convoluted argument like that.