Have you read BIP101? It proposes jumping the blocksize limit to 8 MB next year, and then doubling of the blocksize limit every 2 years, for 20 years. That gives us 8192 MB blocks in 21 years. And that's what the sane bitcoiners should want?
1) It's easier to soft fork to a lower blocksize in the future if blocks are "too large" since it only requires miner support.
2) Really - you think that 8GB blocks in 20 years is obviously crazy? 1gbit bandwidth, although not widespread, is currently available
today. It seems hardly unreasonable to think that technical advances in two decades are not going to be able to keep up. If we're wrong, refer to #1.