You cannot call it a centralized process as anyone can join the mining process if you are able to spend money to participate in the issue of BTCitcoin and you cannot expect to have the share of the incentive without doing anything and if you want to participate you can still run the full node 
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It requires a lot of money. I have a computer, but I can not afford a miner. And many people in the world too. I do not refuse to have my computer do the calculations all day. He is already on around the clock. For example - torrent works constantly. Distributes ... But I can not connect to mining, because for this I need an expensive ASIC..For this reason, I consider some peoples statements that anyone can connect are hypocritical. Not everyone lives in rich countries and has a large salary. However, the rich will never be sympathetic to the poor, which is why I asked a question. What are we doing? Resigning ourselves to what rules the rich have set for ALL? Or do we make the same rules for everyone ?? Did not Satoshi show in his Whitepaper that he was striving to make the same rules for EVERYONE?