Takes less skill/gear in order to make SAM work. Won't be pulling OMGWTF numbers, but yeah sam'd be up there if ya don't wanna do endgame.
Either that or level a healing job to just sit around and heal or something.
If ya like a job enough, you'll end up doing endgame one way or another.
Edit: Not saying anything of you career sams out there. Just saying, it's not that hard to gear for as a DD to put out ok numbers.