Why does EFT focus on "the negative"?

Isn't it contradictory to all this "positive thought" stuff we're supposed to practice?

"Even though I HAVE THIS PROBLEM, I accept myself"

"Even though I'M ANXIOUS, I accept myself"

"Even though I injured my back and I'm REALLY FRUSTRATED, I accept myself"

"Even though crying makes me feel WEAK, I accept myself"

When we workout hard, we eliminate toxins by sweating.