Well, this is where things seem to be going with more and more big mining companies with large upfront investment moving into the market. Somewhat the same with the internet. Look at the small players that rent cloud space - they have a very hard time to compete with the prices of larger companies. The same thing is happening in bitcoin. There are also the advantages of this. A few weeks ago bitcoin was said to be decreasing in hashing power because of the halving. This is a great investment in further supporting the network from attackers.

While centralisation seems to be a problem when this goes live by driving up difficulty. This may then also lead to a general higher costs of mining which may increase the price further and which then may make mining more lucrative. This being a free market more big players could move into mining.