allowing poweful hardware to having mining advantage is simply against distributed consensus.
There is no need to have transfer fees, incentives, etc, to motivate these mining conglomerates. If the next
day, their rigs are all destroyed - it is better for bitcoin; there are million of desktops in India, Indonesia, China
who would willingly do the mining provided the protocol is design to have one-node-one-vote.
The natural assumption is that CPU mining would be more distributed, but it's by no means a guarantee. Before GPU mining and ASICs became a thing, Bitcoin used to have a bit of an issue with Botnets. One attacker with an exploit could infect thousands, or even millions of desktops around the world and have them all mining Bitcoin without the owners' knowledge or consent. That means unscrupulous actors could gain a larger majority in determining how the network is run. In any system, there will always be those who attempt to find ways to gain an unfair advantage.
Also, as a small quibble, strictly speaking,
nodes don't "vote".