Why should I softmod/install homebrew on my dsi?

Hello,

I'm kinda new to homebrew (except for the Wii, there I installed it to play games from an usb stick), so I'm wondering why should I install homebrew if I also have a ttdsi flashcard? I mean yeah I would like to run games from the start menu, just because it looks better and probably saves a little bit of time... But the flash card does the job as well... Anybody who can tell me the advantages of homebrew over flashcards? And what would you recommend me to do?

Thanks in advance!