Hey @Jaemoon_Lee! Welcome to the community and thanks for reaching out.
If I understand correctly, the issue that you're describing is a contentious one. For a long time, the onClick event handler only triggered when clicking on the cell's content, but we changed that behavior earlier this year based on feedback from users like yourself.
Unfortunately, this change wasn't well received, as you can see here - largely due to how it interacted with the Link and Button column types. As a result, we've restored the onClick behavior to its "normal" state while we consider a more thoughtful solution.
As soon as I have news to share, though, I'll provide an update here!