I've got an accelerated A1200 myself, and with a hobby like this it doesn't make sense to question why we soup up our Amigas like we do.
It was just meant as an advice in general to people who are looking to get into WHDLoad, as some are easily led to believe that they must get a 28 MHz 68030 with 16M RAM or whatever, to play the same game that ran on their 512K Amiga 500.