There is a fundamental difference here that can't be ignored. In that pie chart from SPR that you show the different percentages represent large mining farms or individuals that can take advantage of the absence of pools and monopolize the network from a rewards perspective, these people are getting all the coins, some mining with optimized miners.
From a rewards perspective?
But a person who invests thousands of $ should absolutely get more reward. This is a good correlation. You seem to have a problem with that?
We here have nothing against rich people. We have nothing against large investors.
If your farm is securing the blockchain it earns a percentage based on the blocks it finds.
How is this "taking advantage"?
OK, I will make an effort to respond. What I meant was that having no pools is in no clear way a great solution to the problem it was intending to solve as it creates other avenues of manipulation. Pools allow small miners to come together and compete with large miners. In the absence of pools large mining farms can optimize their operation, mine with an advantage and dump on people easier than in a environment that allows for pooled mining.
In conclusion, there are disadvantages to eliminating pooled mining. It is not a poweful solution to the problem.