So, if the process is centralized, it is therefore a sign that in the nearest future, the government of different countries can build a mining farm where they can manipulate to centralize digital currency, if not bitcoin it can be another. By then they can achieve total centralization in Decentralization.
Am I missing a point here or there is something I didn't understand?
There are some countries like Iran that probably have most of Bitcoin mining centralized and controlled by government but they can't fully control everything.
They also don't allow any Bitcoin mined outside Iran to be used in their country, that is so stupid and ridiculous but other countries like China may follow something similar in future.
If governments create their own centralized coins (like they are doing) they don't need to spend any money for mining devices because everything will be fully centralized and controlled by them.