Why isn't tableCaption: a method within WATableTag?

I was looking at the code - in the previous post - and realised that the with: block says:

html tableCaption: 'blah blah'

And that suddenly struck me as odd. The tag is being generated by the WAHtmlCanvas object rather than by the table tag object. That would make sense if the tag could live outside of the table, but I don't think it can.

I don't think this is a problem, it's really more of a design question. I wonder why they built it like this. I feel a question to the beginners' list coming on!