Why did Taeyeon went back to commercial kpop music?

Her latest 2 releases INVU and Weekend are clearly mainstream kpop target that included a choreo, music shows performances and even a be original video, why did she returned to promote like a mid tier kpop act despite already solidifying herself as a ballad queen in South Korea during 2017-2020?

well whatever she releases will do well

Her releases have always been mainstream.

She probably thought it was fun and said why not.