[CyberDildonics]

It does specifically because it increases the barrier to entry. This means the likelyhood of an attack is lower and the cost of an attack is higher. If your Rasberry PI ledger had a market cap of multiple billions of dollars, the likelyhood of an attack that would either steal people's money or shut it down would be pretty much %100.

[woah]

increases the barrier to entry === centralization

[CyberDildonics]

There are many shades of grey. It creates some centralization, thought incentives of the miners are still aligned with the incentives of the people using the currency.

You seem to be implying total centralization, which is not at all true.