Tables and spacer gifs don't necessarily use less Arc code than a simpler layout would. The table layout might even use a bit more if it requires more iteration, macro expansion and branching to render. There are special case macros in the html library for generating parts of the forum table that wouldn't be necessary otherwise.

Also, the goal clearly was to make a website, because pg made a website, and here we all are. Once you put your MVP online it's valid to criticize decisions made for it in that context.