I'd say that coding an 8000x increase into the protocol that is in no way connected to actual capacity needs doesn't really line up with that.
Well, keep in mind that miners won't be required to create larger blocks, they'll just have the opportunity to do so if they want to.
Indeed, but if the limit is raised, we inevitably have to prepare for the case that the space will be used, whether or not that growth in transaction volume is tied to organic adoption, and whether or not we understand today the incentives that may exist for spamming the blockchain tomorrow. So whether or not we believe the limit will be relevant doesn't matter; if the possibility is there, then we need to consider the implications for network security.
If I remember correctly, Satoshi added the 1 MB limit in 2010 to prevent some sort of DDOS attack? If so, then there are a few important questions:
1) Is that DDOS attack still a viable threat if the maximum blocksize limit is removed?
2) If it is still a viable threat, then is it possible to prevent the attack with some method other than a hard block size limit?
3) If it is not possible to prevent the attack with some other method, then is it possible to determine the best limit today, in the near future, and in the long term, without needing to have this debate repeatedly for the rest of bitcoin's existence?
I don't know the mechanics that well. But if, in theory, blocks were large enough to cause significant delays in block propagation times, orphaned blocks become a significant concern.... for one thing, anyway.
Personally, I think it's naive to think that we can determine the best limit today, for the rest of eternity. I don't think we can begin to understand the problems that may come with a scaling of the magnitude suggested by BIP 101. I think scaling should be undertaken on a need basis with technical rigor (neither of which have been put forth in BIP 101 IMO).
I also don't think people should be so afraid of the idea that the block size limit won't permanently be decided by the next fork. It isn't going to be the last fork that bitcoin sees. It simply can't be, if we approach the idea of scaling responsibly, and with the utmost regard for network security and consensus.