I hate point sizes as well. They say nothing about the actual font size when used in the context of outputting to a PNG image versus a printer. Sure, a point size is a "size", but bitmaps size differently, depending on the screen resolution so it's pointless
What we want is something like characters per page line, or lines per page height. And the publishing process calculates the appropriate font size, so that no matter where you output to, the result always has the same text in the same size, even though wildly different resolutions are used.