but it's about ensuring the network is de-centralised.
I've seen all kinds of stupid explanations on these forums for what constitutes "decentralized". The current bitcoin core explanation is basically "the ability to run a node". Lol? Then you got Adam and the 400 MB block gang who didn't even bother to come up with some type of poorly constructed defintion. In reality, it's the ability for people to mine the coins directly which requires commodity off the shelf mining hardware - meaning the network is currently completely centralized. Therefore, anyone who actually cares about decentralization would be campaigning for a PoW change to GPU, otherwise there's no reason for bitcoin to exist.
If everyone mined that would help de-centralise the network, however there is no PoW change that fixes the current one's problems.
GPU's, different algorithms, they all simply kick the centralisation problems a few months down the road. We need something new, but until that comes we are stuck with what we've got.
There's no reason for any common man off the street to support bitcoin unless he can mine it himself. Supporting bitcoin at this juncture simply means helping Jihan Wu and a handful of other monopolies become richer. Bitcoin would likely have already died if it wasn't for altcoins that could be mined then converted to BTC, otherwise the ecosystem would be entirely walled off.