Deleting list items requires clicking the mouse to the left of the item number and then dragging to the end of the line. It is easy to click on the first character of the item (following the item number) and then drag. If your goal is to delete the line, not having selected the entire line (i.e. including the item number) will not produce the expected result.
Additionally, selecting the entire line is a slow process.
Proposed solution
Simply clicking to the left of the item number can select the entire line. This is common behavior is most editors.
These FRs would conflict with each other. For selecting a whole line, I personally think you’d probably still want to double-click, or drag in the margin, so a single click just moves the cursor into place.
As one example, VS Code clicking in the margin moves the cursor. Clicking on the line number gutter selects the entire line. But you have the best of both worlds I guess.
Sometimes it takes 4 clicks, I assume because of Obsidian’s funkiness under the surface. Or maybe you only need 4 clicks to include the newline at the end, I forget.