Why do you feel that the SRS's utility is determined by whether the words are in context or not? In fact, the people over at AJATT[0] have recommended using sentences and never using individual words. You want to practice in the types of situations you're actually going to encounter the language in. And in almost all cases, you'll encounter Korean (and any other spoken language) in the form of whole sentences, or at least phrases.
Are you studying words in isolation or in context? The latter approach makes things much easier.