Yes, Meni R is likely to have a very high IQ.  The Weizmann Institute of Science doesn't just give you an M.Sc. in mathematics because they like the cut of your jib.

To me, Bitcoin-XT represents a somewhat reckless approach, which in the name of advancement shatters existing structures, fragments the community, and spins the ecosystem into chaos. Whereas Bitcoin Core represents a frigid approach, where no technology improvement will ever be made because consensus can't be reached,

Given the choice between short-term sticking with 1MB or going all the way to 8MB, I am in favor of going to 8MB.
Given the choice between sticking with Bitcoin Core or switching to Bitcoin-XT, I am in slight favor of sticking with Bitcoin Core, but that could change any time.

All that said, the parent post explaining theymos' policy makes no sense to me. As explained above, the possibility of forking is an integral part of Bitcoin.