Semantic quibbling aside, let's address what alani clearly meant:
Why would anyone want to force the blocksize limit expanding at pre-set dates. Now, give a sensible reply to what was intended.
It's hardly semantic, and I'm not at all sure what he meant. Many of the arguments against raising the cap only make any sense if understood as an argument against raising the block size.
Let's start simple. Can you give a rational argument against immediately raising the block size cap to 8MB?