Making the blocksize large as a solution will cripple Bitcoin with centralization and lack of anonymity.
Leaving the block size limited to 1 MB will create centralization and lack of anonymity.
With a fixed block size, most people in the world won't be able to conduct transactions directly on the blockchain - they will be forced to to route their transactions through the few privileged entities which can. There's your centralization and lack of anonymity.
Large blocks allow more transactions, which means more transaction fees, which means more revenue for mining as an industry, which means more players can afford to enter the market. That causes decentralization.
The most revolutionary thing about Bitcoin is that it is a truly decentralized store of value;
"Store of value" is an economic myth. Value is not a thing which can be stored.