Vertex selection issue

Vertex selection issue
When applying a subdivision surface in polygon modeling and then editing the vertices, the vertices are not properly selected.

And

It is confusing that right selection and left selection do not work in the same way as vertex selection and movement.
I would like the left selection method to handle vertex clicks and moves in the same way as vertex moves in the right selection.

I want to select the vertex with one click and complete the move. My fingers are very painful.
One click - Double click —> One million clicks - Two million clicks
This will cause pain to the fingers.

This seems like a bug though I find it hard to see what happens your screenshot.

For this you can use the “Select” tool rather than “Select Box”.