And the reason I guessed it to be that way is because it is like that much of the time: once people focus on something that is not broken too badly, more often they mess it up, rather than improve. I think a much better advice would be just to not touch it. Maybe go roll your own crypto if you feel creative, but stop messing up fonts, colors, and the rest of interfaces: plain HTML is good and sufficient for most web publishing.
Edit: though learning about typography still should not harm. Just applying it poorly--as done most of the time--may be annoying. Also same as with colors and adjacent design subjects.